pgsql: Don't call fwrite() with len == 0 when writing out relcache init

Don't call fwrite() with len == 0 when writing out relcache init file. Noticed via -fsanitize=undefined. Backpatch to all branches, for the same reasons as 46ab07ffda9. Discussion: https://postgr.es/m/20220323173537.ll7klrglnp4gn...@alap3.anarazel.de Backpatch: 10- Branch -- REL_14_STABLE

pgsql: Don't call fwrite() with len == 0 when writing out relcache init

Don't call fwrite() with len == 0 when writing out relcache init file. Noticed via -fsanitize=undefined. Backpatch to all branches, for the same reasons as 46ab07ffda9. Discussion: https://postgr.es/m/20220323173537.ll7klrglnp4gn...@alap3.anarazel.de Backpatch: 10- Branch -- REL_11_STABLE

pgsql: Don't call fwrite() with len == 0 when writing out relcache init

Don't call fwrite() with len == 0 when writing out relcache init file. Noticed via -fsanitize=undefined. Backpatch to all branches, for the same reasons as 46ab07ffda9. Discussion: https://postgr.es/m/20220323173537.ll7klrglnp4gn...@alap3.anarazel.de Backpatch: 10- Branch -- REL_10_STABLE

pgsql: Don't call fwrite() with len == 0 when writing out relcache init

Don't call fwrite() with len == 0 when writing out relcache init file. Noticed via -fsanitize=undefined. Backpatch to all branches, for the same reasons as 46ab07ffda9. Discussion: https://postgr.es/m/20220323173537.ll7klrglnp4gn...@alap3.anarazel.de Backpatch: 10- Branch -- REL_12_STABLE

pgsql: Don't call fwrite() with len == 0 when writing out relcache init

Don't call fwrite() with len == 0 when writing out relcache init file. Noticed via -fsanitize=undefined. Backpatch to all branches, for the same reasons as 46ab07ffda9. Discussion: https://postgr.es/m/20220323173537.ll7klrglnp4gn...@alap3.anarazel.de Backpatch: 10- Branch -- REL_13_STABLE

pgsql: Don't call fwrite() with len == 0 when writing out relcache init

Don't call fwrite() with len == 0 when writing out relcache init file. Noticed via -fsanitize=undefined. Backpatch to all branches, for the same reasons as 46ab07ffda9. Discussion: https://postgr.es/m/20220323173537.ll7klrglnp4gn...@alap3.anarazel.de Backpatch: 10- Branch -- master Detail