fix a few warnings/places where the clang static analyzer complains

src/commands.c

@@ -452,7 +452,7 @@ void cmd_move_con_to_workspace_number(I3_CMD, char *which) {
         return;
     }
 
-    LOG("should move window to workspace with number %d\n", which);
+    LOG("should move window to workspace %s\n", which);
     /* get the workspace */
     Con *output, *workspace = NULL;
 
@@ -835,7 +835,7 @@ void cmd_workspace_number(I3_CMD, char *which) {
             child->num == parsed_num);
 
     if (!workspace) {
-        LOG("There is no workspace with number %d, creating a new one.\n", parsed_num);
+        LOG("There is no workspace with number %ld, creating a new one.\n", parsed_num);
         ysuccess(true);
         /* terminate the which string after the endposition of the number */
         *endptr = '\0';
@@ -1421,6 +1421,10 @@ void cmd_layout(I3_CMD, char *layout_str) {
         layout = L_SPLITV;
     else if (strcmp(layout_str, "splith") == 0)
         layout = L_SPLITH;
+    else {
+        ELOG("Unknown layout \"%s\", this is a mismatch between code and parser spec.\n", layout_str);
+        return;
+    }
 
     DLOG("changing layout to %s (%d)\n", layout_str, layout);
 

src/con.c

@@ -1260,6 +1260,9 @@ bool con_fullscreen_permits_focusing(Con *con) {
     while (fs && fs->fullscreen_mode == CF_NONE)
         fs = fs->parent;
 
+    /* fs must be non-NULL since the workspace con doesn’t have CF_NONE and
+     * there always has to be a workspace con in the hierarchy. */
+    assert(fs != NULL);
     /* The most common case is we hit the workspace level. In this
      * situation, changing focus is also harmless. */
     assert(fs->fullscreen_mode != CF_NONE);

src/floating.c

@@ -493,7 +493,7 @@ void drag_pointer(Con *con, const xcb_button_press_event_t *event, xcb_window_t
                 confine_to, border_t border, callback_t callback, const void *extra)
 {
     uint32_t new_x, new_y;
-    Rect old_rect;
+    Rect old_rect = { 0, 0, 0, 0 };
     if (con != NULL)
         memcpy(&old_rect, &(con->rect), sizeof(Rect));
 

src/ipc.c

@@ -758,7 +758,7 @@ static int add_subscription(void *extra, const unsigned char *s,
 #endif
     ipc_client *client = extra;
 
-    DLOG("should add subscription to extra %p, sub %.*s\n", client, len, s);
+    DLOG("should add subscription to extra %p, sub %.*s\n", client, (int)len, s);
     int event = client->num_events;
 
     client->num_events++;

src/key_press.c

@@ -291,7 +291,7 @@ void handle_key_press(xcb_key_press_event_t *event) {
     command_failed = false;
     yajl_status state = yajl_parse(handle, reply, length);
     if (state != yajl_status_ok) {
-        ELOG("Could not parse my own reply. That's weird. reply is %.*s\n", length, reply);
+        ELOG("Could not parse my own reply. That's weird. reply is %.*s\n", (int)length, reply);
     } else {
         if (command_failed)
             start_commanderror_nagbar();

src/load_layout.c

@@ -139,7 +139,7 @@ static int json_string(void *ctx, const unsigned char *val, size_t len) {
 #else
 static int json_string(void *ctx, const unsigned char *val, unsigned int len) {
 #endif
-    LOG("string: %.*s for key %s\n", len, val, last_key);
+    LOG("string: %.*s for key %s\n", (int)len, val, last_key);
     if (parsing_swallows) {
         /* TODO: the other swallowing keys */
         if (strcasecmp(last_key, "class") == 0) {

src/main.c

@@ -424,7 +424,7 @@ int main(int argc, char *argv[]) {
             }
             optind++;
         }
-        LOG("Command is: %s (%d bytes)\n", payload, strlen(payload));
+        DLOG("Command is: %s (%zd bytes)\n", payload, strlen(payload));
         char *socket_path = root_atom_contents("I3_SOCKET_PATH");
         if (!socket_path) {
             ELOG("Could not get i3 IPC socket path\n");
@@ -660,7 +660,6 @@ int main(int argc, char *argv[]) {
     Output *output = NULL;
     if (!(pointerreply = xcb_query_pointer_reply(conn, pointercookie, NULL))) {
         ELOG("Could not query pointer position, using first screen\n");
-        output = get_first_output();
     } else {
         DLOG("Pointer at %d, %d\n", pointerreply->root_x, pointerreply->root_y);
         output = get_output_containing(pointerreply->root_x, pointerreply->root_y);