glGetnPolygonStipple: Added len to param pattern to match glGetnPolygonStippleARB

xml/gl.xml

diff --git a/xml/gl.xml b/xml/gl.xml
index c2158a9..dfc7903 100644
--- a/xml/gl.xml
+++ b/xml/gl.xml
@@ -20832,7 +20832,7 @@
         <command>
             <proto>void <name>glGetnPolygonStipple</name></proto>
             <param><ptype>GLsizei</ptype> <name>bufSize</name></param>
-            <param><ptype>GLubyte</ptype> *<name>pattern</name></param>
+            <param len="bufSize"><ptype>GLubyte</ptype> *<name>pattern</name></param>
         </command>
         <command>
             <proto>void <name>glGetnPolygonStippleARB</name></proto>