Fix bool/int type confusion

Using ++ on a bool variable doesn't work well when stdbool.h is in use.
The original BSD code appears to use int here, so use that instead.
Reviewed-by: Thomas Munro <thomas.munro@enterprisedb.com>

src/timezone/localtime.c

@@ -1379,7 +1379,7 @@ timesub(const pg_time_t *timep, int32 offset,
 	int			y;
 	const int  *ip;
 	int64		corr;
-	bool		hit;
+	int			hit;
 	int			i;
 
 	corr = 0;