usp10: Update ScriptGetCMap to conform to Windows.

dlls/usp10/tests/usp10.c

@@ -220,7 +220,7 @@ void test_ScriptGetCMap(unsigned short pwOutGlyphs[256])
     int             cInChars;
     int             cChars;
     unsigned short  pwOutGlyphs3[256];
-    WCHAR           TestItem1[6] = {'T', 'e', 's', 't', 0x0166, 0}; 
+    WCHAR           TestItem1[6] = {'T', 'e', 's', 't', 'a', 0}; 
     DWORD           dwFlags;
     int             cnt;
 
@@ -249,10 +249,17 @@ void test_ScriptGetCMap(unsigned short pwOutGlyphs[256])
     /* Set psc to NULL, to be able to check if a pointer is returned in psc */
     psc = NULL;
     hr = ScriptGetCMap(NULL, &psc, NULL, 0, 0, NULL);
-    ok( hr == E_INVALIDARG, "(NULL,&psc,NULL,0,0NULL), expected E_INVALIDARG, "
+    ok( hr == E_PENDING, "(NULL,&psc,NULL,0,0NULL), expected E_PENDING, "
                          "got %08x\n", (unsigned int)hr);
     ok( psc == NULL, "Expected psc to be NULL, got %p\n", psc);
 
+    /* Set psc to NULL but add hdc, to be able to check if a pointer is returned in psc */
+    psc = NULL;
+    hr = ScriptGetCMap(hdc, &psc, NULL, 0, 0, NULL);
+    ok( hr == S_OK, "ScriptGetCMap(NULL,&psc,NULL,0,0,NULL), expected S_OK, "
+                    "got %08x\n", (unsigned int)hr);
+    ok( psc != NULL, "ScritpGetCMap expected psc to be not NULL\n");
+
     /* Set psc to NULL, to be able to check if a pointer is returned in psc */
     psc = NULL;
     hr = ScriptGetCMap(NULL, &psc, TestItem1, cInChars, dwFlags, pwOutGlyphs3);

dlls/usp10/usp10.c

@@ -555,7 +555,7 @@ HRESULT WINAPI ScriptGetCMap(HDC hdc, SCRIPT_CACHE *psc, const WCHAR *pwcInChars
     FIXME("(%p,%p,%s,%d,0x%lx,%p): semi-stub\n", hdc, psc, debugstr_wn(pwcInChars,cChars), 
                                                  cChars, dwFlags, pwOutGlyphs);
 
-    if  (!psc || !pwcInChars || !pwOutGlyphs)
+    if  (!psc)
         return E_INVALIDARG;
 
     if  (!hdc && !*psc) {