transformIsIdentity() now doesn't accept a zero matrix as the identity.
Added a non-zero test for one of the diagonal values.
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@ -1464,6 +1464,7 @@ transformIsIdentity(PictTransform *t)
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{
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return ((t->matrix[0][0] == t->matrix[1][1]) &&
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(t->matrix[0][0] == t->matrix[2][2]) &&
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(t->matrix[0][0] != 0) &&
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(t->matrix[0][1] == 0) &&
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(t->matrix[0][2] == 0) &&
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(t->matrix[1][0] == 0) &&
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