[PATCH] Ignore contents of #if 0 blocks.

[Daniel Jasper]

================
Comment at: lib/Format/UnwrappedLineParser.h:236
@@ +235,3 @@
+    PP_If0, // #if 0
+    PP_Else // #else
+  };
----------------
Why do we need to know whether we are in an #else?


http://llvm-reviews.chandlerc.com/D855