Fix ParagraphComment::isWhitespace(): a paragraph without a non-whitespace
TextComment node was considered whitespace even if it contained other child
nodes.

llvm-svn: 160474
diff --git a/clang/test/Sema/warn-documentation.cpp b/clang/test/Sema/warn-documentation.cpp
index f128718..aec914a 100644
--- a/clang/test/Sema/warn-documentation.cpp
+++ b/clang/test/Sema/warn-documentation.cpp
@@ -104,6 +104,9 @@
 /// \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;