Check for NULL pointers returned by HeapAlloc.

dlls/gdi/freetype.c

@@ -974,7 +974,8 @@ BOOL WineEngInit(void)
 	valuelen++; /* returned value doesn't include room for '\0' */
 	valueW = HeapAlloc(GetProcessHeap(), 0, valuelen * sizeof(WCHAR));
 	data = HeapAlloc(GetProcessHeap(), 0, datalen * sizeof(WCHAR));
-
+        if (valueW && data)
+        {
             dlen = datalen * sizeof(WCHAR);
             vlen = valuelen;
             while(RegEnumValueW(hkey, i++, valueW, &vlen, NULL, &type, data,
@@ -982,13 +983,13 @@ BOOL WineEngInit(void)
                 if(((LPWSTR)data)[0] && ((LPWSTR)data)[1] == ':')
                     if(wine_get_unix_file_name((LPWSTR)data, unixname, sizeof(unixname)))
                         AddFontFileToList(unixname, NULL, FALSE);
-
                 /* reset dlen and vlen */
                 dlen = datalen;
                 vlen = valuelen;
             }
-	HeapFree(GetProcessHeap(), 0, data);
-	HeapFree(GetProcessHeap(), 0, valueW);
+        }
+	if (data) HeapFree(GetProcessHeap(), 0, data);
+	if (valueW) HeapFree(GetProcessHeap(), 0, valueW);
 	RegCloseKey(hkey);
     }