[COMMITTED PATCH] Fix c++-types-check conditionalization.

[Roland McGrath]

Committed as obvious.

I noticed this because the power8-linux build slave hit it (and another
patch to follow).  It's nice that we fix all the gratuitous failures when
no C++ compiler is available.  But we do want the bots to have C++
compilers available, so the power8 bot should get whatever it's missing
installed.


Thanks,
Roland


2016-03-04  Roland McGrath  <roland@hack.frob.com>

	* Makefile ($(objpfx)c++-types-check.out): Fix conditionalization
	to test for empty $(CXX) rather than $(CXX) of "no".

diff --git a/Makefile b/Makefile
index 7fc92ae..9c6918d 100644
--- a/Makefile
+++ b/Makefile
@@ -252,8 +252,8 @@ tests-clean:
 	@$(MAKE) subdir_testclean no_deps=t
 
 tests-special += $(objpfx)c++-types-check.out $(objpfx)check-local-headers.out
-ifneq ($(CXX),no)
 
+ifneq (,$(CXX))
 vpath c++-types.data $(+sysdep_dirs)
 
 $(objpfx)c++-types-check.out: c++-types.data scripts/check-c++-types.sh