Take care fall-through case of switch in skia

include/gpu/GrTypesPriv.h

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrTypesPriv_DEFINED
 #define GrTypesPriv_DEFINED
 
@@ skipping 160 matching lines @@
     GR_STATIC_ASSERT(SK_ARRAY_COUNT(kSizes) == kGrVertexAttribTypeCount);
 }
 
 /**
  * converts a GrVertexAttribType to a GrSLType
  */
 static inline GrSLType GrVertexAttribTypeToSLType(GrVertexAttribType type) {
     switch (type) {
         default:
             SkFAIL("Unsupported type conversion");
+            return kVoid_GrSLType;
         case kUByte_GrVertexAttribType:
         case kFloat_GrVertexAttribType:
             return kFloat_GrSLType;
         case kVec2s_GrVertexAttribType:
         case kVec2f_GrVertexAttribType:
             return kVec2f_GrSLType;
         case kVec3f_GrVertexAttribType:
             return kVec3f_GrSLType;
         case kVec4ub_GrVertexAttribType:
         case kVec4f_GrVertexAttribType:
@@ skipping 80 matching lines @@
 // Takes a pointer to a GrCaps, and will suppress prints if required
 #define GrCapsDebugf(caps, ...)         \
     if (!caps->suppressPrints()) {      \
         SkDebugf(__VA_ARGS__);          \
     }
 #else
 #define GrCapsDebugf(caps, ...)
 #endif
 
 #endif