Pixel: added missing ;

src/objects/Pixel.cpp

@@ -4,5 +4,5 @@ using namespace corryvreckan;
 
 void Pixel::print(std::ostream& out) const {
     out << "Pixel " << this->column() << ", " << this->row() << ", " << this->raw() << ", " << this->charge() << ", "
-        << this->timestamp()
+        << this->timestamp();
 }