Alexandre Julliard (@julliard) commented about dlls/msxml3/node.c:
static const WCHAR colW = ':'; WCHAR *ptr;
/* +1 for ':' */
ptr = *name = SysAllocStringLen(NULL, SysStringLen(base) + SysStringLen(prefix) + 1);
/* +1 for possible ':', +1 for \0 */
ptr = *name = SysAllocStringLen(NULL, SysStringLen(base) + SysStringLen(prefix) + 1 + 1);
This shouldn't be necessary.