libbb/copy_file.c: use smallints instead of signed chars

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/libbb/copy_file.c b/libbb/copy_file.c
index 57d9dbf..9333a8d 100644
--- a/libbb/copy_file.c
+++ b/libbb/copy_file.c
@@ -78,9 +78,9 @@
 	/* NB: each struct stat is ~100 bytes */
 	struct stat source_stat;
 	struct stat dest_stat;
-	signed char retval = 0;
-	signed char dest_exists = 0;
-	signed char ovr;
+	smallint retval = 0;
+	smallint dest_exists = 0;
+	smallint ovr;
 
 /* Inverse of cp -d ("cp without -d") */
 #define FLAGS_DEREF (flags & (FILEUTILS_DEREFERENCE + FILEUTILS_DEREFERENCE_L0))
@@ -147,7 +147,6 @@
 			return -1;
 		}
 
-		/* Create DEST */
 		if (dest_exists) {
 			if (!S_ISDIR(dest_stat.st_mode)) {
 				bb_error_msg("target '%s' is not a directory", dest);
@@ -156,6 +155,7 @@
 			/* race here: user can substitute a symlink between
 			 * this check and actual creation of files inside dest */
 		} else {
+			/* Create DEST */
 			mode_t mode;
 			saved_umask = umask(0);