(*width)=0;
(*height)=0;
+/* this is to make compile on aix work since they seem to define jmpbuf
+ to be _jmpbuf which breaks compilation */
+
+#ifdef jmpbuf
+#undef jmpbuf
+#endif
+
if (setjmp(png_read_ptr->jmpbuf)){
png_destroy_read_struct(&png_read_ptr, &info_ptr, (png_infopp)NULL);
return 0;