actually check the size of initialoptions

dependencies/subprojects/animationwindow/src/widgets/DropdownList.cpp

@@ -3,7 +3,7 @@
 
 TDT4102::DropdownList::DropdownList(TDT4102::Point location, unsigned int width, unsigned int height, std::vector<std::string> &initialOptions) 
     : TDT4102::Widget(location, width, height) {
-    if(options.size() == 0) {
+    if(initialOptions.size() == 0) {
         throw std::runtime_error("The list of options must contain at least one option to choose from!");
     }
     options = initialOptions;