From coverity:
From coverity:

rootcint.cxx: fix 12302 (invalid file descriptor use)
  fix 21043, 21044 (not trusting that content of argv is limited in size)


git-svn-id: ecbadac9c76e8cf640a0bca86f6bd796c98521e3@34922 27541ba8-7e3a-0410-8455-c3a389f83636

dawehner/root,dawehner/root,dawehner/root,dawehner/root,bbannier/ROOT,bbannier/ROOT,dawehner/root,dawehner/root,bbannier/ROOT,dawehner/root,bbannier/ROOT,bbannier/ROOT,dawehner/root,bbannier/ROOT,bbannier/ROOT