[PATCH] Modules: Error on missing header files only if a module is built/used.

[NAKAMURA Takumi]

================
Comment at: include/clang/Lex/ModuleMap.h:185
@@ -184,3 +184,3 @@
   ///
   /// \param DC A diagnostic consumer that will be cloned for use in generating
   /// diagnostics.
----------------
Could you update \param DC? [-Wdocumentation]


http://llvm-reviews.chandlerc.com/D2352