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unichrome: Assert that pointer is not null before dereferencing.

This commit is contained in:
Vinson Lee 2010-02-27 14:56:27 -08:00
parent 1eba490202
commit e31a379661
1 changed files with 2 additions and 0 deletions
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2
src/mesa/drivers/dri/unichrome/via_ioctl.c
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@ -757,6 +757,8 @@ static void via_emit_cliprect(struct via_context *vmesa,
vb[0] = HC_HEADER2;
vb[1] = (HC_ParaType_NotTex << 16);
assert(vmesa->driDrawable);
if (vmesa->driDrawable->w == 0 || vmesa->driDrawable->h == 0) {
vb[2] = (HC_SubA_HClipTB << 24) | 0x0;
vb[3] = (HC_SubA_HClipLR << 24) | 0x0;