CVS commit by faure: 

Don't crash on setPrefix(null string) (in fact this only affected HEAD, but
better be safe)


  M +2 -1      dom_element.cpp   1.43


--- kdelibs/khtml/dom/dom_element.cpp  #1.42:1.43
@@ -367,5 +367,6 @@ bool Element::khtmlValidAttrName(const D
 bool Element::khtmlValidPrefix(const DOMString &name)
 {
-    return khtmlValidAttrName(name);
+    // Null prefix is ok. If not null, reuse code from khtmlValidAttrName
+    return !name.implementation() || khtmlValidAttrName(name);
 }