swscale: prevent invalid writes in packed_16bpc_bswap
Writes past the end of the destination buffer were occuring when its stride was smaller than the stride of the source. Fixes Bug #183.
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@ -285,9 +285,10 @@ static int packed_16bpc_bswap(SwsContext *c, const uint8_t *src[],
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int dststr = dstStride[0] >> 1;
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uint16_t *dstPtr = (uint16_t *) dst[0];
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const uint16_t *srcPtr = (const uint16_t *) src[0];
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int min_stride = FFMIN(srcstr, dststr);
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for (i = 0; i < srcSliceH; i++) {
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for (j = 0; j < srcstr; j++) {
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for (j = 0; j < min_stride; j++) {
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dstPtr[j] = av_bswap16(srcPtr[j]);
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}
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srcPtr += srcstr;
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