fix segfault on node 0.10.x

src/CanvasRenderingContext2d.cc

@@ -737,7 +737,7 @@ NAN_METHOD(Context2d::GetImageData) {
 
   Local<Int32> sizeHandle = Nan::New(size);
   Local<Value> caargv[] = { sizeHandle };
-  Local<Object> clampedArray = global->Get(Nan::New("Uint8ClampedArray").ToLocalChecked()).As<Function>()->NewInstance(3, caargv);
+  Local<Object> clampedArray = global->Get(Nan::New("Uint8ClampedArray").ToLocalChecked()).As<Function>()->NewInstance(1, caargv);
 #else
   Local<ArrayBuffer> buffer = ArrayBuffer::New(Isolate::GetCurrent(), size);
   Local<Uint8ClampedArray> clampedArray = Uint8ClampedArray::New(buffer, 0, size);