Fixed some compiler warnings.

git-svn-id: svn://svn.code.sf.net/p/dmtcp/code/trunk@2307 ba6dc0ae-232f-0410-883f-9ebac64fc565
Minor fix for 2287.

git-svn-id: svn://svn.code.sf.net/p/dmtcp/code/trunk@2308 ba6dc0ae-232f-0410-883f-9ebac64fc565
Compiler warning fix; Removed redundant JASSERT.

git-svn-id: svn://svn.code.sf.net/p/dmtcp/code/trunk@2309 ba6dc0ae-232f-0410-883f-9ebac64fc565