Removed const from typecast when calling png_sig_cmp to enable compatibility with libpng 1.2.

Also changed dependency (in configure.in) from libpng 1.5 to libpng 1.2.

1 files changed, 1 insertions, 1 deletions

diff --git a/plugingui/image.cc b/plugingui/image.cc
index 4864007..40da520 100644
--- a/plugingui/image.cc
+++ b/plugingui/image.cc
@@ -82,7 +82,7 @@ void GUI::Image::load(const char* data, size_t size)
   const char *header = data;
 
   // test for it being a png:
-  if(png_sig_cmp((const png_byte*)header, 0, 8)) {
+  if(png_sig_cmp((png_byte*)header, 0, 8)) {
     abort_("[read_png_file] File is not recognized as a PNG file");
   }