André Hentschel : usp10: Fix possible crashes (clang).

[Alexandre Julliard]

Module: wine
Branch: master
Commit: a6a7bceb1ad48316db7fb59dd4d4ee63c67fbcab
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=a6a7bceb1ad48316db7fb59dd4d4ee63c67fbcab

Author: André Hentschel <nerv at dawncrow.de>
Date:   Wed Jul 13 20:46:42 2011 +0200

usp10: Fix possible crashes (clang).

---

 dlls/usp10/usp10.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/dlls/usp10/usp10.c b/dlls/usp10/usp10.c
index afc4e72..50de8bf 100644
--- a/dlls/usp10/usp10.c
+++ b/dlls/usp10/usp10.c
@@ -1612,7 +1612,7 @@ HRESULT WINAPI ScriptShapeOpenType( HDC hdc, SCRIPT_CACHE *psc,
     if (cRanges)
         FIXME("Ranges not supported yet\n");
 
-    rtl = (!psa->fLogicalOrder && psa->fRTL);
+    rtl = (psa && !psa->fLogicalOrder && psa->fRTL);
 
     *pcGlyphs = cChars;
     if ((hr = init_script_cache(hdc, psc)) != S_OK) return hr;
@@ -1640,7 +1640,7 @@ HRESULT WINAPI ScriptShapeOpenType( HDC hdc, SCRIPT_CACHE *psc,
         pwLogClust[i] = idx;
     }
 
-    if (!psa->fNoGlyphIndex)
+    if (psa && !psa->fNoGlyphIndex)
     {
         WCHAR *rChars;
         if ((hr = SHAPE_CheckFontForRequiredFeatures(hdc, (ScriptCache *)*psc, psa)) != S_OK) return hr;