updated for version 7.3.745
Problem: Automatically setting 'ttymouse' doesn't work.
Solution: Reset the "option was set" flag when using the default.
diff --git a/src/proto/option.pro b/src/proto/option.pro
index fd71704..63570fa 100644
--- a/src/proto/option.pro
+++ b/src/proto/option.pro
@@ -52,6 +52,7 @@
void vimrc_found __ARGS((char_u *fname, char_u *envname));
void change_compatible __ARGS((int on));
int option_was_set __ARGS((char_u *name));
+void reset_option_was_set __ARGS((char_u *name));
int can_bs __ARGS((int what));
void save_file_ff __ARGS((buf_T *buf));
int file_ff_differs __ARGS((buf_T *buf, int ignore_empty));