B20001 - shopkeeper angry at unnamed customer

The "following" flag could get set in several places where it was not
obvious that the customer name would be remembered.  Since the shopkeeper
should always get angry at the current player, set the name at the same
place that the flag is set.

doc/fixes34.1

@@ -390,6 +390,7 @@ wielding Werebane prevents catching lycanthropy via monster attack (but not
 	via eating, nor does it cure an existing case)
 character inflicted with lycanthropy is vulnerable to Werebane when in
 	human/elf/&c form as well as when in beast form
+shopkeeper could get angry without remembering the customer name
 
 
 Platform- and/or Interface-Specific Fixes

src/shk.c

@@ -999,6 +999,7 @@ register struct monst *shkp;
 	if(!shkp->isshk) return;
 
 	rile_shk(shkp);
+	(void) strncpy(ESHK(shkp)->customer, plname, PL_NSIZ);
 	ESHK(shkp)->following = 1;
 }
 
@@ -2469,8 +2470,6 @@ register boolean peaceful, silent;
 
 	    if(!silent) {
 		if(cansee(shkp->mx, shkp->my)) {
-		    if(ESHK(shkp)->customer[0] == 0)
-			(void) strncpy(ESHK(shkp)->customer,plname,PL_NSIZ);
 		    Norep("%s booms: \"%s, you are a thief!\"",
 				Monnam(shkp), plname);
 		} else  Norep("You hear a scream, \"Thief!\"");