Fix breakage with -DLODEPNG_NO_COMPILE_CRC#161
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Compiling with -DLODEPNG_NO_COMPILE_CRC would lead to linker errors, since lodepng_crc32() was still being referenced: liblodepng.a(lodepng.o): in function `lodepng_chunk_check_crc': lodepng.cpp:2496: undefined reference to `lodepng_crc32' liblodepng.a(lodepng.o): in function `lodepng_chunk_generate_crc': lodepng.cpp:2503: undefined reference to `lodepng_crc32' liblodepng.a(lodepng.o): in function `lodepng_inspect': lodepng.cpp:4083: undefined reference to `lodepng_crc32' Just #ifdef out the references too, ignoring CRCs in the decoder and generating a zero CRC in the encoder.
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Compiling with -DLODEPNG_NO_COMPILE_CRC would lead to linker errors, since
lodepng_crc32() was still being referenced:
liblodepng.a(lodepng.o): in function
lodepng_chunk_check_crc:lodepng.cpp:2496: undefined reference to
lodepng_crc32liblodepng.a(lodepng.o): in function
lodepng_chunk_generate_crc:lodepng.cpp:2503: undefined reference to
lodepng_crc32liblodepng.a(lodepng.o): in function
lodepng_inspect:lodepng.cpp:4083: undefined reference to
lodepng_crc32Just #ifdef out the references too, ignoring CRCs in the decoder and
generating a zero CRC in the encoder.