Index: opencv/modules/flann/src/miniflann.cpp
===================================================================
--- opencv/modules/flann/src/miniflann.cpp	(revision 6748)
+++ opencv/modules/flann/src/miniflann.cpp	(working copy)
@@ -644,6 +644,7 @@
     if( algo == FLANN_INDEX_LSH )
     {
         saveIndex_<LshIndex>(this, index, fout);
+        fclose(fout);
         return;
     }