fix: free process args in pthread

src/midi.c

@@ -73,5 +73,6 @@ void *midi_background_listen(void *args) {
     log_info("(%s) background acquisition stopped after error", device->name);
     midi_close(device);
   }
+  free(process_args);
   pthread_exit(NULL);
 }

src/state.c

@@ -643,6 +643,7 @@ void *state_background_write(void *args) {
   }
 
   log_info("(state) background writing stopped by main thread");
+  free(process_args);
   pthread_exit(NULL);
 }
 

src/video.c

@@ -377,6 +377,7 @@ void *video_background_read(void *args) {
     video_capture->disconnected = true;
     context->input_formats[input_index] = 0;
   }
+  free(process_args);
   pthread_exit(NULL);
 }