add equality operator to Regdims

opm/parser/eclipse/EclipseState/Tables/Regdims.hpp

@@ -72,6 +72,13 @@ namespace Opm {
         }
 
 
+        bool operator==(const Regdims& data) const {
+            return this->getNTFIP() == data.getNTFIP() &&
+                   this->getNMFIPR() == data.getNMFIPR() &&
+                   this->getNRFREG() == data.getNRFREG() &&
+                   this->getNTFREG() == data.getNTFREG() &&
+                   this->getNPLMIX() == data.getNPLMIX();
+        }
 
 
     private: