updated for version 7.3.862
Problem: Dragging the status line can be slow.
Solution: Look ahead and drop the drag event if there is a next one.
diff --git a/src/proto/misc1.pro b/src/proto/misc1.pro
index d362e9c..0354535 100644
--- a/src/proto/misc1.pro
+++ b/src/proto/misc1.pro
@@ -42,6 +42,7 @@
void check_status __ARGS((buf_T *buf));
void change_warning __ARGS((int col));
int ask_yesno __ARGS((char_u *str, int direct));
+int is_mouse_key __ARGS((int c));
int get_keystroke __ARGS((void));
int get_number __ARGS((int colon, int *mouse_used));
int prompt_for_number __ARGS((int *mouse_used));