Fix many compiler warnings. There should only be two changes in behavior: arogue7/fight.c, arogue7/fight.c: a to-hit bonus is now correctly applied to characters who are not monks instead of monks who are not empty-handed. urogue/fight.c: fixed an interaction with the "debug" macro that could cause the wrong message to be displayed.

--- a/srogue/command.c	Sat Mar 20 22:36:52 2021 -0400
+++ b/srogue/command.c	Wed Apr 14 18:55:33 2021 -0400
@@ -638,14 +638,10 @@
 void
 shell(void)
 {
-	reg int pid;
-	reg char *sh;
-	int ret_status;
 
 	/*
 	 * Set the terminal back to original mode
 	 */
-	sh = getenv("SHELL");
 	wclear(hw);
 	wmove(hw, LINES-1, 0);
 	draw(hw);