gdi32: Avoid calling get_dc_ptr on a null handle.

cc973b0c · Alexandre Julliard · e4e55ed8 · cc973b0c
Commit cc973b0c authored Dec 01, 2009 by Alexandre Julliard
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dc.c dlls/gdi32/dc.c +2 -2

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--- a/dlls/gdi32/dc.c
+++ b/dlls/gdi32/dc.c
@@ -750,8 +750,9 @@ HDC WINAPI CreateCompatibleDC( HDC hdc )

    GDI_CheckNotLock();

-    if ((origDC = get_dc_ptr( hdc )))
+    if (hdc)
    {
+        if (!(origDC = get_dc_ptr( hdc ))) return 0;
        if (GetObjectType( hdc ) == OBJ_DC)
        {
            funcs = origDC->funcs;
@@ -760,7 +761,6 @@ HDC WINAPI CreateCompatibleDC( HDC hdc )
        release_dc_ptr( origDC );
        if (funcs) funcs = DRIVER_get_driver( funcs );
    }
-    else if (hdc) return 0;

    if (!funcs && !(funcs = DRIVER_load_driver( displayW ))) return 0;