message: Simplify going to next key part of the search string.
diff: @@ -295,10 +295,8 @@ size_t IndexArray::index_string(StringData value, IntegerColumn& result, Interna
  width = get_width_from_header(header);
  is_inner_node = get_is_inner_bptree_node_from_header(header);
  - if (value.size() - stringoffset >= 4)
  + // Go to next key part of the string. If the offset exceeds the string length, the key will be 0
  stringoffset += 4;
  - else
  - stringoffset += value.size() - stringoffset + 1;
  // Update 4 byte index key
  key = StringIndex::create_key(value, stringoffset);
  