Convert mime data length to use unsigned long

What we want to use is size_t, but we don't want the implied POSIX
dependency. However, POSIX does say that size_t is an unsigned integer
that is no longer than a long, so it would appear safe to use an
unsigned long as a replacement. Safer at least than unsigned int.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/cairo-png.c b/src/cairo-png.c
index 8b2ff77fa..41a33d753 100644
--- a/src/cairo-png.c
+++ b/src/cairo-png.c
@@ -529,7 +529,7 @@ read_png (struct png_read_closure_t *png_closure)
     cairo_format_t format;
     cairo_status_t status;
     unsigned char *mime_data;
-    unsigned int mime_data_length;
+    unsigned long mime_data_length;
 
     png_closure->png_data = _cairo_memory_stream_create ();