Sync with upstream

Even though libgd/libgd#492 is not a relevant bug fix for PHP, since
the binding doesn't use the `gdImage*Ptr()` functions at all, we're
porting the fix to stay in sync here.
gdImagePtr gdImageCreateFromJpegCtx (gdIOCtx * infile)
{
	return gdImageCreateFromJpegCtxEx(infile, 1);
}

gdImagePtr gdImageCreateFromJpegCtx (gdIOCtx * infile)
{
	return gdImageCreateFromJpegCtxEx(infile, 1);
}
