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Memory leak with empty arrays #248
Description
Hi, it looks like there's a memory leak for arrays that have no elements.
Repro command with ruby_memcheck
ruby_memcheck -e 'require "numo/narray"; Numo::SFloat.new(0, 3)'Output
16 bytes in 1 blocks are definitely lost in loss record 2 of 33
malloc (at /usr/libexec/valgrind/vgpreload_memcheck-arm64-linux.so)
rb_gc_impl_malloc (default.c:8294)
ruby_xmalloc2_body (gc.c:5221)
ruby_xmalloc2 (gc.c:5215)
*na_alloc_shape (narray.c:303)
*na_setup_shape (narray.c:313)
*na_setup (narray.c:335)
*na_initialize (narray.c:394)
vm_call_cfunc_with_frame_ (vm_insnhelper.c:3902)
vm_sendish.constprop.0 (vm_insnhelper.c:6124)
vm_exec_core (insns.def:904)
vm_exec_loop (vm.c:2825)
rb_vm_exec (vm.c:2804)
rb_ec_exec_node (eval.c:283)
ruby_run_node (eval.c:321)
rb_main (main.c:42)
main (main.c:62)
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