Fix problem with not NULL terminating mapping name.
Fix problem with not NULL terminating mapping name.

BUG=453
Review URL: http://breakpad.appspot.com/323001

git-svn-id: 7939527bf0a06ad24ad020f729d5600cb42ed5d7@881 4c0a9323-5329-0410-9bdc-e9ce6186880e

mikewied/breakpad,mikewied/breakpad,mikewied/breakpad,mikewied/breakpad,mikewied/breakpad,mikewied/breakpad