remove compile warnings

1 files changed, 1 insertions, 2 deletions

diff --git a/src/fids/db.c b/src/fids/db.c
index e0021bc48..35caf7eeb 100644
--- a/src/fids/db.c
+++ b/src/fids/db.c
@@ -32,11 +32,10 @@ static DB *database[HASH_MAX] = {NULL};
 
 // djb2 hash function by Dan Bernstein
 static unsigned hash(const char *str) {
-        const unsigned char *s = (unsigned char *) str;
         unsigned long hash = 5381;
         int c;
 
-        while (c = *s++)
+        while ((c = *str++) != '\0')
                 hash = ((hash << 5) + hash) + c; /* hash * 33 + c */
 
         return hash & (HASH_MAX - 1);