Merge pull request #2584 from laanwj/2013_04_shrinkdebugfile_leak

Prevent prevent file descriptor leak in ShrinkDebugFile()

src/util.cpp

@@ -1231,6 +1231,8 @@ void ShrinkDebugFile()
             fclose(file);
         }
     }
+    else if(file != NULL)
+	     fclose(file);
 }