In debug mode, there is a compiler bug or mismatch, added fix for that.

Needed to add -U__GNUC_STDC_INLINE__ to CXXFLAGS, otherwise is space,
etc, are not being inlined correctly.  This is with —std=gnu++0x, or
other c++11 options, with gcc 4.8, on the mac (os x mavericks).

Also fixed typo in M2_ASSERT statement.