clutter-1.0: Fix confgure test errors found by clang
We were using nested functions inadvertantly and they were compiling fine
with gcc but clang doesnt support nested functions hence configure tests for
cogl started to fail, but it was a test error not compiler error
which was undetected thus far
Backport a fix from upstream to help clang compile clutter
Signed-off-by: Khem Raj <raj.khem@gmail.com> Signed-off-by: Ross Burton <ross.burton@intel.com>
