Zbigniew Jędrzejewski-Szmek
830464c3e4
All underlying glibc calls are free to return NULL if the size argument is 0. We most often call those functions with a fixed argument, or at least something which obviously cannot be zero, but it's too easy to forget. E.g. coverity complains about "rows = new0(JsonVariant*, n_rows-1);" in format-table.c There is an assert that n_rows > 0, so we could hit this corner case here. Let's simplify callers and make those functions "safe". CID #1397035. The compiler is mostly able to optimize this away: $ size build{,-opt}/src/shared/libsystemd-shared-239.so (before) text data bss dec hex filename 2643329 580940 3112 3227381 313ef5 build/src/shared/libsystemd-shared-239.so (-O0 -g) 2170013 578588 3089 2751690 29fcca build-opt/src/shared/libsystemd-shared-239.so (-03 -flto -g) (after) text data bss dec hex filename 2644017 580940 3112 3228069 3141a5 build/src/shared/libsystemd-shared-239.so 2170765 578588 3057 2752410 29ff9a build-opt/src/shared/libsystemd-shared-239.so
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