Imported from libpng-1.2.22beta3.tar

pngtest.c

@@ -1550,4 +1550,4 @@ main(int argc, char *argv[])
 }
 
 /* Generate a compiler error if there is an old png.h in the search path. */
-typedef version_1_2_22beta2 your_png_h_is_not_version_1_2_22beta2;
+typedef version_1_2_22beta3 your_png_h_is_not_version_1_2_22beta3;