compositor-wayland: Use glFlush() not glFinish() after rendering frame
diff --git a/compositor/compositor-wayland.c b/compositor/compositor-wayland.c
index 85010b6..e5d0d84 100644
--- a/compositor/compositor-wayland.c
+++ b/compositor/compositor-wayland.c
@@ -177,7 +177,8 @@
 	struct timeval tv;
 	uint32_t msec;
 
-	glFinish();
+	glFlush();
+
 	wl_list_for_each(output, &base->output_list, base.link) {
 		output->current ^= 1;