comctl32: Fix a memory leak

[Andrew Talbot]

Changelog:
    comctl32: Fix a memory leak.

diff -urN a/dlls/comctl32/treeview.c b/dlls/comctl32/treeview.c
--- a/dlls/comctl32/treeview.c	2007-09-11 17:19:59.000000000 +0100
+++ b/dlls/comctl32/treeview.c	2007-09-13 15:51:43.000000000 +0100
@@ -3803,6 +3803,7 @@
             if (ptr == NULL)
             {
                 ERR("OutOfMemory, cannot allocate space for label\n");
+                if(newText != tmpText) Free(newText);
                 DestroyWindow(infoPtr->hwndEdit);
                 infoPtr->hwndEdit = 0;
                 return FALSE;