Add MRB_ALLOCV()
for temporary memory allocation
#4853
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MRB_ALLOCV(mrb, type, var, n)
definestype *var
variable and assigntemporarily allocated memory for n objects of type type. If the
allocation size is less than or equal to
MRB_ALLOCV_ON_STACK_MAX
, allocateon the stack, otherwise use
mrb_alloca()
.MRB_ALLOCV_ON_STACK_MAX
is configurable inmrbconf.h
(default is 256).