crashfix: decal report when missing the DB entry was malformed

Engine/source/T3D/decal/decalDataFile.cpp

@@ -209,7 +209,7 @@ bool DecalDataFile::read( Stream &stream )
 				data->materialName = "WarningMaterial";
 				data->material = dynamic_cast<Material*>(Sim::findObject("WarningMaterial"));
 			
-				Con::errorf( "DecalDataFile::read() - DecalData %s does not exist! Temporarily created %s_missing.", lookupName.c_str() );
+				Con::errorf( "DecalDataFile::read() - DecalData %s does not exist! Temporarily created %s_missing.", lookupName.c_str(), lookupName.c_str());
 			}
       }