[PATCH] doc/ophelp.xsd: fix ophelp validation schema (event's attribute "ext")

On AMD, <event> tag can have an attribute "ext" used for IBS. In such
case, the XML validation failed, since the schema did not know this.
---
 doc/ophelp.xsd | 1 +
 1 file changed, 1 insertion(+)

diff --git a/doc/ophelp.xsd b/doc/ophelp.xsd
index 1270121..a4b7fd8 100644
--- a/doc/ophelp.xsd
+++ b/doc/ophelp.xsd
@@ -34,6 +34,7 @@
       <xs:attribute name="counter_mask" type="xs:nonNegativeInteger" use="required"/>
       <xs:attribute name="min_count" type="xs:nonNegativeInteger" use="required"/>
       <xs:attribute name="desc" type="xs:string" use="required"/>
+      <xs:attribute name="ext" type="xs:string" use="optional"/>
     </xs:complexType>
   </xs:element>
   
-- 
1.8.3.1


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