Reviewed by NOBODY (OOPS!).
Enabling -Wmissing-prototypes fixes an Xcode 4 project warning.
This also fixes the following compiler warning:
* Configurations/Base.xcconfig: Set
GCC_WARN_ABOUT_MISSING_PROTOTYPES = YES.
(getThreadGlobalData): Made static.
*sigh* "webkit-patch upload" fail. I was trying to make it smarter about reusing a local commit log. It also likes to create bugs at the drop of a hat.
*** This bug has been marked as a duplicate of bug 60710 ***