Memory leak fix for ogrdgnlayer.cpp

Frank,

 

Below is a memory leak fix for ogrdgnlayer.cpp, when converting

complex linestrings from the dgn the child DGNElement (psChildElement)

wasn't being freed after conversion to the poChildFeature.

 

Steve Brooks

 

 

$ diff clean/ogrdgnlayer.cpp modified/ogrdgnlayer.cpp
587c587,590
<                   poChildFeature = ElementToFeature( psChildElement );
---
>               {
>                  poChildFeature = ElementToFeature( psChildElement );
>                  DGNFreeElement( hDGN, psChildElement );
>               }