Fix another small oversight in command_no_begin patch.

Need a "return false" to prevent tests from continuing after we've moved
the "query" pointer.  As it stood, it'd accept "DROP DISCARD ALL" as a
match.

src/bin/psql/common.c

@@ -1367,6 +1367,7 @@ command_no_begin(const char *query)
 			return true;
 		if (wordlen == 10 && pg_strncasecmp(query, "tablespace", 10) == 0)
 			return true;
+		return false;
 	}
 
 	/* DISCARD ALL isn't allowed in xacts, but other variants are allowed. */
@@ -1382,6 +1383,7 @@ command_no_begin(const char *query)
 
 		if (wordlen == 3 && pg_strncasecmp(query, "all", 3) == 0)
 			return true;
+		return false;
 	}
 
 	return false;