limit the visibility of dead mouse functions

source/global.h

@@ -289,9 +289,6 @@ void		includedir(const char *dirname);
 void		initsymtab(void);
 void		makefilelist(const char * const * const argv);
 void		mousecleanup(void);
-void		mousemenu(void);
-void		mouseinit(void);
-void		mousereinit(void);
 void		myexit(int sig);
 void		myperror(char *text);
 void		progress(char *what, long current, long max);

source/mouse.c

@@ -43,6 +43,12 @@
  *         future complete rewrite of mouse support
  */
 
+void mousemenu(void);
+void mouseinit(void);
+void mousereinit(void);
+
+// extern    bool    unixpcmouse;		/* UNIX PC mouse interface */
+
 extern int LINES;
 
 #define FLDLINE (LINES - FIELDS - 1 - 1) /* first input field line */