secure strscpy by replacing with strncpy

src/ipc.c

@@ -77,7 +77,7 @@ static void ipc_send_message(int fd, const unsigned char *payload,
     char msg[buffer_size];
     char *walk = msg;
 
-    strcpy(walk, "i3-ipc");
+    strncpy(walk, "i3-ipc", buffer_size - 1);
     walk += strlen("i3-ipc");
     memcpy(walk, &message_size, sizeof(uint32_t));
     walk += sizeof(uint32_t);