merge revision(s) 49490,49494: [Backport #10825]
* ext/sdbm/_sdbm.c: include ruby/ruby.h for PRIdPTRDIFF when a macro `DEBUG` is defined. based on the patch by Owen Rodley in [ruby-core:67987]. [Bug #10825]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_0_0@49736 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merge revision(s) 49490,49494: [Backport #10825]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_0_0@49736 b2dd03c8-39d4-4d8f-98ff-823fe69b080e