Comment parsing: fix a crash when dumping comment ast for a function template
with variadic parameters

Patch by Joe Ranieri.

llvm-svn: 204236
diff --git a/clang/test/Misc/ast-dump-comment.cpp b/clang/test/Misc/ast-dump-comment.cpp
index 4e84af0..5bd6934 100644
--- a/clang/test/Misc/ast-dump-comment.cpp
+++ b/clang/test/Misc/ast-dump-comment.cpp
@@ -67,3 +67,11 @@
 // CHECK:      VarDecl{{.*}}Test_VerbatimBlockComment
 // CHECK:        VerbatimBlockComment{{.*}} Name="verbatim" CloseName="endverbatim"
 // CHECK-NEXT:     VerbatimBlockLineComment{{.*}} Text=" Aaa"
+
+/// \param ... More arguments
+template<typename T>
+void Test_TemplatedFunctionVariadic(int arg, ...);
+// CHECK:      FunctionTemplateDecl{{.*}}Test_TemplatedFunctionVariadic
+// CHECK:        ParamCommandComment{{.*}} [in] implicitly Param="..."
+// CHECK-NEXT:     ParagraphComment
+// CHECK-NEXT:       TextComment{{.*}} Text=" More arguments"