f2fs: convert is_extension_exist() to return bool type

is_extension_exist() only return two values, 0 or 1.
So there is no need to use int type.
Signed-off-by: Yangtao Li <frank.li@vivo.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

fs/f2fs/namei.c

@@ -22,7 +22,7 @@
 #include "acl.h"
 #include <trace/events/f2fs.h>
 
-static inline int is_extension_exist(const unsigned char *s, const char *sub,
+static inline bool is_extension_exist(const unsigned char *s, const char *sub,
 						bool tmp_ext)
 {
 	size_t slen = strlen(s);
@@ -30,19 +30,19 @@ static inline int is_extension_exist(const unsigned char *s, const char *sub,
 	int i;
 
 	if (sublen == 1 && *sub == '*')
-		return 1;
+		return true;
 
 	/*
 	 * filename format of multimedia file should be defined as:
 	 * "filename + '.' + extension + (optional: '.' + temp extension)".
 	 */
 	if (slen < sublen + 2)
-		return 0;
+		return false;
 
 	if (!tmp_ext) {
 		/* file has no temp extension */
 		if (s[slen - sublen - 1] != '.')
-			return 0;
+			return false;
 		return !strncasecmp(s + slen - sublen, sub, sublen);
 	}
 
@@ -50,10 +50,10 @@ static inline int is_extension_exist(const unsigned char *s, const char *sub,
 		if (s[i] != '.')
 			continue;
 		if (!strncasecmp(s + i + 1, sub, sublen))
-			return 1;
+			return true;
 	}
 
-	return 0;
+	return false;
 }
 
 int f2fs_update_extension_list(struct f2fs_sb_info *sbi, const char *name,