provide some debug developer controls - part 1

include/extern.h

@@ -26,7 +26,7 @@ E void NDECL(display_gamewindows);
 E void NDECL(newgame);
 E void FDECL(welcome, (BOOLEAN_P));
 E time_t NDECL(get_realtime);
-E boolean FDECL(argcheck, (int, char **, enum earlyarg));
+E int FDECL(argcheck, (int, char **, enum earlyarg));
 
 /* ### apply.c ### */
 

include/flag.h

@@ -221,6 +221,16 @@ enum getloc_filters {
     NUM_GFILTER
 };
 
+struct debug_flags {
+    boolean test;
+#ifdef TTY_GRAPHICS
+    boolean ttystatus;
+#endif
+#ifdef WIN32
+    boolean immediateflips;
+#endif
+};
+
 struct instance_flags {
     /* stuff that really isn't option or platform related. They are
      * set and cleared during the game to control the internal
@@ -423,6 +433,7 @@ struct instance_flags {
     short mines_prize_type;     /* luckstone */
     short soko_prize_type1;     /* bag of holding or    */
     short soko_prize_type2;     /* amulet of reflection */
+    struct debug_flags debug;
 };
 
 /*