hash.c: separate NULL and EMPTY check functions. RHASH_TABLE_EMPTY function checks NULL table or not, but it should be named "NULL_P". Introduce RHASH_TABLE_EMPTY_P function to check size == 0. There are cases that hash has table data even if data is not NULL (in case removed after inserted elements).
Added by ko1 (Koichi Sasada) almost 7 years ago
separte NULL and EMPTY check.
RHASH_TABLE_EMPTYfunction checks NULL table or not,but it should be named "NULL_P".
Introduce
RHASH_TABLE_EMPTY_Pfunction to check size == 0.There are cases that hash has table data even if data is not NULL
(in case removed after inserted elements).
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66392 b2dd03c8-39d4-4d8f-98ff-823fe69b080e