Fix bogus "inline namespace cannot be reopened as non-inline" diagnostic to
just warn that the second declaration is missing the 'inline' keyword. This is
valid, and we shouldn't be suggesting otherwise.

llvm-svn: 282981
diff --git a/clang/lib/Sema/SemaDeclCXX.cpp b/clang/lib/Sema/SemaDeclCXX.cpp
index 6c952e0..133f1f4 100644
--- a/clang/lib/Sema/SemaDeclCXX.cpp
+++ b/clang/lib/Sema/SemaDeclCXX.cpp
@@ -8089,7 +8089,7 @@
     S.Diag(Loc, diag::warn_inline_namespace_reopened_noninline)
       << FixItHint::CreateInsertion(KeywordLoc, "inline ");
   else
-    S.Diag(Loc, diag::err_inline_namespace_mismatch) << *IsInline;
+    S.Diag(Loc, diag::err_inline_namespace_mismatch);
 
   S.Diag(PrevNS->getLocation(), diag::note_previous_definition);
   *IsInline = PrevNS->isInline();