Skip lcp call in SearchStepWise if no partial key

ConflictSet.cpp

@@ -1777,11 +1777,14 @@ struct SearchStepWise {
     if (child == nullptr) {
       return true;
     }
+    if (child->partialKeyLen > 0) {
       int cl = std::min<int>(child->partialKeyLen, remaining.size() - 1);
-    int i = longestCommonPrefix(child->partialKey(), remaining.data() + 1, cl);
+      int i =
+          longestCommonPrefix(child->partialKey(), remaining.data() + 1, cl);
       if (i != child->partialKeyLen) {
         return true;
       }
+    }
     n = child;
     remaining =
         remaining.subspan(1 + child->partialKeyLen,