Fix ParagraphComment::isWhitespace(): a paragraph without a non-whitespace

TextComment node was considered whitespace even if it contained other child
nodes.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@160474 91177308-0d34-0410-b5e6-96231b3b80d8

lib/AST/Comment.cpp

@@ -116,7 +116,8 @@ bool ParagraphComment::isWhitespaceNoCache() const {
     if (const TextComment *TC = dyn_cast<TextComment>(*I)) {
       if (!TC->isWhitespace())
         return false;
-    }
+    } else
+      return false;
   }
   return true;
 }

test/Sema/warn-documentation.cpp

@@ -104,6 +104,9 @@ int test_block_command4(int);
 /// \brief Aaa
 int test_block_command5(int);
 
+/// \brief \c Aaa
+int test_block_command6(int);
+
 // expected-warning@+1 {{'\param' command used in a comment that is not attached to a function declaration}}
 /// \param a Blah blah.
 int test_param1;