patch 7.4.1995

Problem:    GUI: cursor drawn in wrong place if a timer callback causes a
            screen update. (David Samvelyan)
Solution:   Also redraw the cursor when it's blinking and on.

src/gui_mac.c

@@ -5116,6 +5116,12 @@ gui_mch_destroy_scrollbar(scrollbar_T *sb)
 
     int
 gui_mch_is_blinking(void)
+{
+    return FALSE;
+}
+
+    int
+gui_mch_is_blink_off(void)
 {
     return FALSE;
 }