In this unreachable code, return an initialized value.

This stops gcc warning about possible uses of an uninitialized
value when compiling with assertions turned off.

llvm-svn: 74775

llvm/include/llvm/Target/TargetLowering.h

@@ -256,7 +256,7 @@ public:
         return getTypeAction(NVT) == Promote ? getTypeToTransformTo(NVT) : NVT;
     }
     assert(0 && "Unsupported extended type!");
-    return MVT(); // Not reached
+    return MVT(MVT::Other); // Not reached
   }
 
   /// getTypeToExpandTo - For types supported by the target, this is an
@@ -557,7 +557,7 @@ public:
       return getRegisterType(getTypeToTransformTo(VT));
     }
     assert(0 && "Unsupported extended type!");
-    return MVT(); // Not reached
+    return MVT(MVT::Other); // Not reached
   }
 
   /// getNumRegisters - Return the number of registers that this ValueType will