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don't try to write non-existant textures
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@ -361,6 +361,8 @@ extract_textures (void)
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sizeof (default_palette));
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for (i = 0; i < miptexlump->nummiptex; i++) {
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if (miptexlump->dataofs[i] == -1)
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continue;
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miptex = (miptex_t *)(bsp->texdata + miptexlump->dataofs[i]);
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pixels = miptex->width * miptex->height / 64 * 85;
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mtsize = sizeof (miptex_t) + pixels;
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