comctl32/imagelist: Fix a couple of imagelist leaks (Valgrind).

dlls/comctl32/imagelist.c

@@ -3384,7 +3384,12 @@ static HRESULT WINAPI ImageListImpl_Merge(IImageList *iface, int i1,
 
     /* Get the interface for the new image list */
     if (hNew)
+    {
+        IImageList *imerge = (IImageList*)hNew;
+
         ret = HIMAGELIST_QueryInterface(hNew, riid, ppv);
+        IImageList_Release(imerge);
+    }
 
     IImageList_Release(iml2);
     return ret;
@@ -3534,7 +3539,12 @@ static HRESULT WINAPI ImageListImpl_GetDragImage(IImageList *iface, POINT *ppt,
 
     /* Get the interface for the new image list */
     if (hNew)
+    {
+        IImageList *idrag = (IImageList*)hNew;
+
         ret = HIMAGELIST_QueryInterface(hNew, riid, ppv);
+        IImageList_Release(idrag);
+    }
 
     return ret;
 }