Attempting to unset an undefined variable or function should not be

considered an error according to the Open Group Base Specification.

PR:		standards/45738
Submitted by:	Matthias Andree <matthias.andree@web.de>
MFC after:	3 days

bin/sh/exec.c

@@ -701,7 +701,7 @@ unsetfunc(char *name)
 		delete_cmd_entry();
 		return (0);
 	}
-	return (1);
+	return (0);
 }
 
 /*

bin/sh/var.c

@@ -761,7 +761,7 @@ unsetvar(char *s)
 		}
 	}
 
-	return (1);
+	return (0);
 }