Eliminate "-Wsign-compare" warnings on Linux ...
With these being newly enabled for the loader, layers, and demos (and it turns
out, for the icd/common directory), it is appropriate to fix them.
diff --git a/demos/cube.c b/demos/cube.c
index 00951b5..42a9570 100644
--- a/demos/cube.c
+++ b/demos/cube.c
@@ -561,8 +561,8 @@
{
//header for testing if it is a png
png_byte header[8];
- int i, is_png, bit_depth, color_type,rowbytes;
- png_uint_32 twidth, theight;
+ int is_png, bit_depth, color_type,rowbytes;
+ png_uint_32 i, twidth, theight;
png_structp png_ptr;
png_infop info_ptr, end_info;
png_byte *image_data;