[Fixed Point Arithmetic] Fixed Point to Boolean Cast

This patch is a part of https://reviews.llvm.org/D48456 in an attempt to split
the casting logic up into smaller patches. This contains the code for casting
from fixed point types to boolean types.

Differential Revision: https://reviews.llvm.org/D53308

llvm-svn: 345063
diff --git a/clang/lib/Edit/RewriteObjCFoundationAPI.cpp b/clang/lib/Edit/RewriteObjCFoundationAPI.cpp
index 5a7982a..7c9ab17 100644
--- a/clang/lib/Edit/RewriteObjCFoundationAPI.cpp
+++ b/clang/lib/Edit/RewriteObjCFoundationAPI.cpp
@@ -1086,6 +1086,7 @@
       llvm_unreachable("OpenCL-specific cast in Objective-C?");
 
     case CK_FixedPointCast:
+    case CK_FixedPointToBoolean:
       llvm_unreachable("Fixed point types are disabled for Objective-C");
     }
   }