updated for version 7.3.745

Problem:    Automatically setting 'ttymouse' doesn't work.
Solution:   Reset the "option was set" flag when using the default.

src/option.c

@@ -11178,6 +11178,19 @@ option_was_set(name)
     return FALSE;
 }
 
+/*
+ * Reset the flag indicating option "name" was set.
+ */
+    void
+reset_option_was_set(name)
+    char_u	*name;
+{
+    int idx = findoption(name);
+
+    if (idx >= 0)
+	options[idx].flags &= ~P_WAS_SET;
+}
+
 /*
  * compatible_set() - Called when 'compatible' has been set or unset.
  *