Use %lu in case of an unexpected EOF or row-skew

We could use the macros from stdint.h but this should be good
enough.

1 files changed, 2 insertions, 2 deletions

diff --git a/if2png.c b/if2png.c
index b52a516..c3b8901 100644
--- a/if2png.c
+++ b/if2png.c
@@ -70,9 +70,9 @@ main(int argc, char *argv[])
 		goto err;
 	}
 
-	for (i=0; i < height; ++i) {
+	for (i = 0; i < height; ++i) {
 		if (fread(png_row, 1, png_row_len, stdin) != png_row_len) {
-			fprintf(stderr, "unexpected EOF or row-skew at %d\n", i);
+			fprintf(stderr, "unexpected EOF or row-skew at %lu\n", (unsigned long)i);
 			goto err;
 		}
 		png_write_row(png_struct_p, png_row);