Merge pull request #2499 from gforney/master

jpeg source: add debugging comments to jpeg and gd source:

Author: gforney

Source/gd-2.3.3/gd_jpeg.c

@@ -48,9 +48,17 @@
 #endif
 
 /* 1.8.1: remove dependency on jinclude.h */
+//#pragma pack(push, 8)
 #include "jpeglib.h"
+//#pragma pack(pop)
 #include "jerror.h"
 
+
+//#pragma message ("sizeof(jpeg_compress_struct) = " STRINGIFY(sizeof(struct jpeg_compress_struct)))
+//#pragma message ("sizeof(jpeg_error_mgr) = " STRINGIFY(sizeof(struct jpeg_error_mgr)))
+
+//static_assert(sizeof(struct jpeg_compress_struct) == 584, "Check jpeg_compress_struct size");
+
 static const char *const GD_JPEG_VERSION = "1.0";
 
 typedef struct _jmpbuf_wrapper {

Source/jpeg-9b/jcinit.c

@@ -20,6 +20,14 @@
 #include "jinclude.h"
 #include "jpeglib.h"
 
+//#define STRINGIFY_HELPER(x) #x
+//#define STRINGIFY(x) STRINGIFY_HELPER(x)
+
+//#pragma message ("sizeof(jpeg_compress_struct) = " STRINGIFY(sizeof(struct jpeg_compress_struct)))
+//#pragma message ("sizeof(jpeg_error_mgr) = " STRINGIFY(sizeof(struct jpeg_error_mgr)))
+
+
+//static_assert(sizeof(struct jpeg_compress_struct) == 584, "Check jpeg_compress_struct size");
 
 /*
  * Master selection of compression modules.