Match ofs/cnt types in diff interface.

Signed-off-by: Junio C Hamano <junkio@cox.net>

combine-diff.c

@@ -151,7 +151,8 @@ static void append_lost(struct sline *sline, int n, const char *line, int len)
 struct combine_diff_state {
 	struct xdiff_emit_state xm;
 
-	unsigned int lno, ob, on, nb, nn;
+	unsigned int lno;
+	int ob, on, nb, nn;
 	unsigned long nmask;
 	int num_parent;
 	int n;

xdiff-interface.c

@@ -1,10 +1,10 @@
 #include "cache.h"
 #include "xdiff-interface.h"
 
-static int parse_num(char **cp_p, unsigned int *num_p)
+static int parse_num(char **cp_p, int *num_p)
 {
 	char *cp = *cp_p;
-	unsigned int num = 0;
+	int num = 0;
 	int read_some;
 
 	while ('0' <= *cp && *cp <= '9')
@@ -17,8 +17,8 @@ static int parse_num(char **cp_p, unsigned int *num_p)
 }
 
 int parse_hunk_header(char *line, int len,
-		      unsigned int *ob, unsigned int *on,
+		      int *ob, int *on,
-		      unsigned int *nb, unsigned int *nn)
+		      int *nb, int *nn)
 {
 	char *cp;
 	cp = line + 4;

xdiff-interface.h

@@ -15,7 +15,7 @@ struct xdiff_emit_state {
 
 int xdiff_outf(void *priv_, mmbuffer_t *mb, int nbuf);
 int parse_hunk_header(char *line, int len,
-		      unsigned int *ob, unsigned int *on,
+		      int *ob, int *on,
-		      unsigned int *nb, unsigned int *nn);
+		      int *nb, int *nn);
 
 #endif