Fix handling of macro definitions.

Now correctly formats:
 #define A (1)

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@173264 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Format/UnwrappedLineParser.cpp b/lib/Format/UnwrappedLineParser.cpp
index 1b39442..ad641a2 100644
--- a/lib/Format/UnwrappedLineParser.cpp
+++ b/lib/Format/UnwrappedLineParser.cpp
@@ -240,7 +240,8 @@
     return;
   }
   nextToken();
-  if (FormatTok.Tok.getKind() == tok::l_paren) {
+  if (FormatTok.Tok.getKind() == tok::l_paren &&
+      FormatTok.WhiteSpaceLength == 0) {
     parseParens();
   }
   addUnwrappedLine();