vout_macosx: add additional sanity checks to prevent rare crashes

diff --git a/modules/video_output/macosx.m b/modules/video_output/macosx.m
index dc71dfa551b91bf8a525e8c69ed47662c660a8d3..8d31402e0cde0c088b36de4ebb89ae3319f0412b 100644 (file)
--- a/modules/video_output/macosx.m
+++ b/modules/video_output/macosx.m
@@ -423,6 +423,9 @@ static int Control (vout_display_t *vd, int query, va_list ap)
 static int OpenglLock (vlc_gl_t *gl)
 {
     vout_display_sys_t *sys = (vout_display_sys_t *)gl->sys;
+    if (!sys->glView || ![sys->glView respondsToSelector:@selector(openGLContext)])
+        return 1;
+
     NSOpenGLContext *context = [sys->glView openGLContext];
     CGLError err = CGLLockContext ([context CGLContextObj]);
     if (kCGLNoError == err) {