Fix format strings for off_t and int.

--- gimgextract.c.orig	Sun Mar 10 22:25:18 2013
+++ gimgextract.c	Sun Mar 10 22:26:21 2013
@@ -70,7 +70,7 @@ int main (int argc, char *argv[])
 		sf_offset = read_2byte_at(infp, offset + 0x20) * block_size;
 		sf_size = read_4byte_at(infp, offset + 0xc);
 		if (sf_offset == 0 || sf_size == 0)
-			errexit("subfile %s has 0 offset or size: 0x%lx 0x%lx\n",
+			errexit("subfile %s has 0 offset or size: 0x%llx 0x%d\n",
 					sf_name, sf_offset, sf_size);
 
 		outfp = fopen(sf_name, "wb");
