Convert local WindowsDisplay jclass reference to global.

src/native/windows/opengl/context.h

@@ -57,7 +57,7 @@ typedef struct {
  * Register the LWJGL window class.
  * Returns true for success, or false for failure
  */
-extern bool registerWindow();
+extern bool registerWindow(WNDPROC win_proc, LPCTSTR class_name);
 
 extern bool applyPixelFormat(JNIEnv *env, HDC hdc, int iPixelFormat);
 

src/native/windows/opengles/context.h

@@ -54,7 +54,7 @@ typedef struct {
  * Register the LWJGL window class.
  * Returns true for success, or false for failure
  */
-extern bool registerWindow();
+extern bool registerWindow(WNDPROC win_proc, LPCTSTR class_name);
 
 //extern bool applyPixelFormat(JNIEnv *env, HDC hdc, int iPixelFormat);
 

src/native/windows/org_lwjgl_opengl_Display.c

@@ -114,7 +114,7 @@ static LRESULT CALLBACK lwjglWindowProc(HWND hWnd,
 }
 
 JNIEXPORT void JNICALL Java_org_lwjgl_opengl_WindowsDisplay_setWindowProc(JNIEnv *env, jclass clazz, jobject method) {
-	windowsDisplayClass = clazz;
+	windowsDisplayClass = (*env)->NewGlobalRef(env, clazz);
 	javaWindowProc = (*env)->FromReflectedMethod(env, method);
 }
 
@@ -535,5 +535,4 @@ JNIEXPORT jboolean JNICALL Java_org_lwjgl_opengl_WindowsDisplay_nTrackMouseEvent
 		tme.dwFlags = TME_LEAVE;
 		tme.hwndTrack = hwnd;
 		return TrackMouseEvent(&tme);
-}
-
+}