fix label address

src/Assembleur.cpp

@@ -69,7 +69,8 @@ std::uint32_t Assembleur::ParseLabel(const std::string& a_Label) {
 		throw std::invalid_argument("Label " + a_Label + " not found !");
 	}
 
-	return it->second;
+	// the address starts at 0, not 1
+	return it->second - 1;
 }
 
 void Assembleur::AddLabel(const std::string& a_Label, std::uint32_t a_Line) {