Add support for -Wimplicit-function-declaration, rdar://5907433


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@50672 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaDecl.cpp b/lib/Sema/SemaDecl.cpp
index ada6ceb..f583ad1 100644
--- a/lib/Sema/SemaDecl.cpp
+++ b/lib/Sema/SemaDecl.cpp
@@ -1268,9 +1268,10 @@
 /// call, forming a call to an implicitly defined function (per C99 6.5.1p2).
 ScopedDecl *Sema::ImplicitlyDefineFunction(SourceLocation Loc, 
                                            IdentifierInfo &II, Scope *S) {
-  if (getLangOptions().C99)  // Extension in C99.
+  // Extension in C99.  Legal in C90, but warn about it.
+  if (getLangOptions().C99)
     Diag(Loc, diag::ext_implicit_function_decl, II.getName());
-  else  // Legal in C90, but warn about it.
+  else
     Diag(Loc, diag::warn_implicit_function_decl, II.getName());
   
   // FIXME: handle stuff like: