remove c++ warnings flag .. this is not c++ after all

[rrdtool.git] / src / pngsize.c

diff --git a/src/pngsize.c b/src/pngsize.c
index 1705fc8..42b849d 100644 (file)
--- a/src/pngsize.c
+++ b/src/pngsize.c
@@ -31,7 +31,11 @@ int PngSize(
 #undef jmpbuf
 #endif
 
-    if (setjmp(png_read_ptr->jmpbuf)) {
+#ifndef png_jmpbuf
+#  define png_jmpbuf(png_ptr)   ((png_ptr)->jmpbuf)
+#endif
+
+    if (setjmp(png_jmpbuf(png_read_ptr))) {
         png_destroy_read_struct(&png_read_ptr, &info_ptr, (png_infopp) NULL);
         return 0;
     }