PSP2: Delete threads after they return

CHANGES

@@ -21,6 +21,7 @@ Bugfixes:
  - Wii: Fix framelimiting after a slowdown
  - PSP2: Fix gyroscope direction
  - Qt: Fix hanging key press after disabling autofire
+ - PSP2: Delete threads after they return
 Misc:
  - 3DS: Use blip_add_delta_fast for a small speed improvement
  - OpenGL: Log shader compilation failure

src/platform/psp2/threading.h

@@ -132,7 +132,11 @@ static inline int ThreadCreate(Thread* thread, ThreadEntry entry, void* context)
 }
 
 static inline int ThreadJoin(Thread thread) {
-	return sceKernelWaitThreadEnd(thread, 0, 0);
+	int res = sceKernelWaitThreadEnd(thread, 0, 0);
+	if (res < 0) {
+		return res;
+	}
+	return sceKernelDeleteThread(thread);
 }
 
 static inline int ThreadSetName(const char* name) {