Fix a typo in a plain scalar scanner.
Fix a typo in a plain scalar scanner.

git-svn-id: 6e6564d5ce6810ef0b7cb8f2d1f00fa8fbbe4f52@191 18f92427-320e-0410-9341-c67f048884a3

Stibbons/pyyaml,ravenac95/simpleyaml,Stibbons/pyyaml,ravenac95/PyYAML,ingydotnet/pyyaml-mirror,ravenac95/PyYAML