Avoid expensive re-init from switching to external sync after render_init has been called

1 files changed, 4 insertions, 1 deletions

diff --git a/render_sdl.c b/render_sdl.c
index 79e9b37..bdc8117 100755
--- a/render_sdl.c
+++ b/render_sdl.c
@@ -265,7 +265,10 @@ void render_set_external_sync(uint8_t ext_sync_on)
 {
 	if (ext_sync_on != external_sync) {
 		external_sync = ext_sync_on;
-		render_config_updated();
+		if (windowed_width) {
+			//only do this if render_init has already been called
+			render_config_updated();
+		}
 	}
 }