Fix build with Clang.

Clang's validation is a bit more thorough than GCC's or MSVC's and
picked up a few new errors and warnings. We missed a few default
cases in switches and used an improper type for default arguments.

BUG=angle:568

Change-Id: I34239c6c5c785ad1e62917fc37c3243f4c5b5f1b
Reviewed-on: https://chromium-review.googlesource.com/195472
Tested-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Shannon Woods <shannonwoods@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
diff --git a/src/compiler/translator/OutputHLSL.cpp b/src/compiler/translator/OutputHLSL.cpp
index 37812ff..e79474a 100644
--- a/src/compiler/translator/OutputHLSL.cpp
+++ b/src/compiler/translator/OutputHLSL.cpp
@@ -4192,6 +4192,8 @@
       case EvqCentroidOut:
       case EvqVertexOut:
         return true;
+
+      default: break;
     }
 
     return false;
@@ -4208,6 +4210,8 @@
       case EvqCentroidIn:
       case EvqFragmentIn:
         return true;
+
+      default: break;
     }
 
     return false;