File xaralx-libpng.patch of Package xaralx

Index: XaraLX-0.7r1785/wxOil/outptpng.cpp
===================================================================
--- XaraLX-0.7r1785.orig/wxOil/outptpng.cpp
+++ XaraLX-0.7r1785/wxOil/outptpng.cpp
@@ -580,8 +580,8 @@ TRACEUSER( "Jonathan", _T("PNG write: X,
 TRACEUSER( "Jonathan", _T("PNG write: Bitdepth = %d\n"),BitsPerPixel);
 		info_ptr->palette			= NULL;
 		info_ptr->num_palette		= 0;
-		//info_ptr->trans_values	= 0;	// - transparent pixel for non-paletted images
-		info_ptr->trans				= NULL;	// - array of transparent entries for paletted images
+		//info_ptr->trans_color		= 0;	// - transparent pixel for non-paletted images
+		info_ptr->trans_alpha			= NULL;	// - array of transparent entries for paletted images
 		info_ptr->num_trans			= 0;	// - number of transparent entries
 TRACEUSER( "Jonathan", _T("PNG write: TransColour = %d\n"),TransparentColour);
 		if ( BitsPerPixel <= 8 )
@@ -634,12 +634,12 @@ TRACEUSER( "Jonathan", _T("PNG write: Tr
 				// We will only create as many as we require, i.e. up to the transparent colour entry
 				// rather a full palettes worth
 				INT32 NumEntries = TransparentColour + 1;
-				info_ptr->trans				= (png_byte *)CCMalloc(NumEntries * sizeof (png_byte));	
-				if (info_ptr->trans)
+				info_ptr->trans_alpha			= (png_byte *)CCMalloc(NumEntries * sizeof (png_byte));	
+				if (info_ptr->trans_alpha)
 				{
 					// Set the number of transparent entries
 					info_ptr->num_trans			= NumEntries;
-					png_byte * pTransEntry		= info_ptr->trans;
+					png_byte * pTransEntry		= info_ptr->trans_alpha;
 					info_ptr->valid |= PNG_INFO_tRNS;
 					for (INT32 i = 0; i < TransparentColour; i++)
 					{
@@ -783,10 +783,10 @@ BOOL OutputPNG::CleanUpPngStructures()
 				CCFree(info_ptr->palette);
 				info_ptr->palette = NULL;
 			}
-			if (info_ptr->trans)
+			if (info_ptr->trans_alpha)
 			{
-				CCFree(info_ptr->trans);
-				info_ptr->trans = NULL;
+				CCFree(info_ptr->trans_alpha);
+				info_ptr->trans_alpha = NULL;
 			}
 		}