EQName PSI: Don't throw a NullPointerException if the rhs prefix or local name is null.

Author: rhdunn

src/main/java/uk/co/reecedunn/intellij/plugin/xquery/psi/impl/xquery/XQueryEQNamePsiImpl.java

@@ -54,11 +54,11 @@ public boolean equals(Object other) {
         PsiElement lhsLocalName = getLocalName();
         PsiElement rhsLocalName = rhs.getLocalName();
         if ((lhsLocalName == null && rhsLocalName == null) ||
-            (lhsLocalName != null && lhsLocalName.getText().equals(rhsLocalName.getText()))) {
+            (lhsLocalName != null && rhsLocalName != null && lhsLocalName.getText().equals(rhsLocalName.getText()))) {
             PsiElement lhsPrefix = getPrefix();
             PsiElement rhsPrefix = rhs.getPrefix();
             return (lhsPrefix == null && rhsPrefix == null) ||
-                   (lhsPrefix != null && lhsPrefix.getText().equals(rhsPrefix.getText()));
+                   (lhsPrefix != null && rhsPrefix != null && lhsPrefix.getText().equals(rhsPrefix.getText()));
         }
         return false;
     }