glpclview: Don't crash when init fails, just keep retrying

Signed-off-by: Hector Martin <hector@marcansoft.com>

Author: marcan

examples/glpclview.c

@@ -109,8 +109,12 @@ void DrawGLScene()
 short *depth = 0;
 char *rgb = 0;
 uint32_t ts;
-freenect_sync_get_depth((void**)&depth, &ts);
-freenect_sync_get_rgb((void**)&rgb, &ts);
+if (freenect_sync_get_depth((void**)&depth, &ts) < 0)
+return;
+if (freenect_sync_get_rgb((void**)&rgb, &ts) < 0) {
+free(depth);
+return;
+}
 
 static unsigned int indices[480][640];
 static short xyz[480][640][3];