[PATCH] diff.c: locate_size_cache() fix.

This fixes two bugs.

 - declaration of auto variable "cmp" was preceeded by a
   statement, causing compilation error on real C compilers;
   noticed and patch given by Yoichi Yuasa.

 - the function's calling convention was overloading its size
   parameter to mean "largest possible value means do not add
   entry", which was a bad taste.  Brought up during a
   discussion with Peter Baudis.

Signed-off-by: Junio C Hamano <junkio@cox.net>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff.c

@@ -236,6 +236,7 @@ static struct sha1_size_cache {
 static int sha1_size_cache_nr, sha1_size_cache_alloc;
 
 static struct sha1_size_cache *locate_size_cache(unsigned char *sha1,
+						 int find_only,
 						 unsigned long size)
 {
 	int first, last;
@@ -244,9 +245,9 @@ static struct sha1_size_cache *locate_size_cache(unsigned char *sha1,
 	first = 0;
 	last = sha1_size_cache_nr;
 	while (last > first) {
-		int next = (last + first) >> 1;
+		int cmp, next = (last + first) >> 1;
 		e = sha1_size_cache[next];
-		int cmp = memcmp(e->sha1, sha1, 20);
+		cmp = memcmp(e->sha1, sha1, 20);
 		if (!cmp)
 			return e;
 		if (cmp < 0) {
@@ -256,7 +257,7 @@ static struct sha1_size_cache *locate_size_cache(unsigned char *sha1,
 		first = next+1;
 	}
 	/* not found */
-	if (size == UINT_MAX)
+	if (find_only)
 		return NULL;
 	/* insert to make it at "first" */
 	if (sha1_size_cache_alloc <= sha1_size_cache_nr) {
@@ -337,13 +338,13 @@ int diff_populate_filespec(struct diff_filespec *s, int size_only)
 		struct sha1_size_cache *e;
 
 		if (size_only) {
-			e = locate_size_cache(s->sha1, UINT_MAX);
+			e = locate_size_cache(s->sha1, 1, 0);
 			if (e) {
 				s->size = e->size;
 				return 0;
 			}
 			if (!sha1_file_size(s->sha1, &s->size))
-				locate_size_cache(s->sha1, s->size);
+				locate_size_cache(s->sha1, 0, s->size);
 		}
 		else {
 			s->data = read_sha1_file(s->sha1, type, &s->size);