This enables ncurses mouse support, which was broken (it seemed to depend
on gpm in an unhealthy way).

diff -ur tvision-0.8-orig/lib/system.cc lib/system.cc
--- tvision-0.8-orig/lib/system.cc	Wed Jul 21 20:44:59 2004
+++ lib/system.cc	Wed Jul 21 21:14:29 2004
@@ -709,6 +709,10 @@
  * Reads a key from the keyboard.
  */
 #ifdef NCURSES_MOUSE_VERSION
+static void msInit();
+static void msClose();
+static void msSuspend();
+static void msResume();
 static void msHandle();
 #endif
 
@@ -1139,6 +1143,28 @@
  */
 
 #ifdef NCURSES_MOUSE_VERSION
+static mmask_t orig_mousemask = 0;
+
+static void msInit()
+{
+	mmask_t m = mousemask(ALL_MOUSE_EVENTS | REPORT_MOUSE_POSITION, &orig_mousemask);
+}
+
+static void msClose()
+{
+	mmask_t m = mousemask(orig_mousemask, NULL);
+}
+
+static void msSuspend()
+{
+	mmask_t m = mousemask(0, NULL);
+}
+
+static void msResume()
+{
+	mmask_t m = mousemask(ALL_MOUSE_EVENTS | REPORT_MOUSE_POSITION, NULL);
+}
+
 static void msHandle()
 {
 	TEvent event;
@@ -1738,6 +1764,10 @@
 	TScreen::drawMouse(0);
 #ifdef ENABLE_GPM
 	gpmClose();
+#else
+#ifdef NCURSES_MOUSE_VERSION
+	msClose();
+#endif
 #endif
 	stopcurses();
 #ifdef ENABLE_VCS
@@ -1925,6 +1955,10 @@
 	startcurses();		/* curses stuff */
 #ifdef ENABLE_GPM
 	gpmInit();
+#else
+#ifdef NCURSES_MOUSE_VERSION
+	msInit();
+#endif
 #endif
 	/* catch useful signals */
 
@@ -1958,6 +1992,10 @@
 	startcurses();
 #ifdef ENABLE_GPM
 	gpmResume();
+#else
+#ifdef NCURSES_MOUSE_VERSION
+	msResume();
+#endif
 #endif
 	doRepaint++;
 }
@@ -1966,6 +2004,10 @@
 {
 #ifdef ENABLE_GPM
 	gpmSuspend();
+#else
+#ifdef NCURSES_MOUSE_VERSION
+	msSuspend();
+#endif
 #endif
 	stopcurses();
 }
@@ -1993,6 +2035,10 @@
 		 */
 #ifdef ENABLE_GPM
 		gpmSuspend();
+#else
+#ifdef NCURSES_MOUSE_VERSION
+		msSuspend();
+#endif
 #endif
 		clear();	/* blank the screen */
 		refresh();	/* this is necessary */
@@ -2000,6 +2046,10 @@
 		startcurses();
 #ifdef ENABLE_GPM
 		gpmResume();
+#else
+#ifdef NCURSES_MOUSE_VERSION
+		msResume();
+#endif
 #endif
 		doResize = 0;
 		winsize win;