Patch: format checking messages and C++

[Mark Mitchell]

  +#define C_STD_NAME(feature_ver) (c_language == clk_cplusplus	\
  +				 ? "ISO C++"			\
  +				 : (feature_ver == STD_EXT	\
  +				    ? "ISO C"			\
  +				    : "ISO C89"))
 
Spell the parameter name as `FEATURE_VAR' -- we generally use ALL_CAPS
for macro parameter names.  Other than that, the patch is fine.  Thanks!

--
Mark Mitchell                   mark@codesourcery.com
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