Add support for Virtual Pipewire Source Nodes

src/audio/pipewire/SDL_pipewire.c

@@ -706,7 +706,7 @@ static void registry_event_global_callback(void *object, uint32_t id, uint32_t p
             // Just want sink and source
             if (!SDL_strcasecmp(media_class, "Audio/Sink")) {
                 recording = false;
-            } else if (!SDL_strcasecmp(media_class, "Audio/Source")) {
+            } else if (!SDL_strcasecmp(media_class, "Audio/Source") || !SDL_strcasecmp(media_class, "Audio/Source/Virtual")) {
                 recording = true;
             } else {
                 return;