File: fix-crash-if-aa-steps-are-invalid.patch

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--- a/ext/gd/gd.c
+++ b/ext/gd/gd.c
@@ -4228,6 +4228,11 @@ PHP_FUNCTION(imagepstext)
 		return;
 	}
 
+	if (aa_steps != 4 && aa_steps != 16) {
+		php_error_docref(NULL TSRMLS_CC, E_WARNING, "Antialias steps must be 4 or 16");
+		RETURN_FALSE;
+	}
+
 	ZEND_FETCH_RESOURCE(bg_img, gdImagePtr, &img, -1, "Image", le_gd);
 	ZEND_FETCH_RESOURCE(f_ind, int *, &fnt, -1, "Type 1 font", le_ps_font);