gui: fix condition handling for lists

Base class must be called first, otherwise the condition can never
again become true. Fixes font size switching in Material theme.

Change-Id: I160a733549495e1bde3cead56b0a3582f0dc744c

gui/fileselector.cpp

@@ -171,11 +171,11 @@ int GUIFileSelector::Update(void)
 
 int GUIFileSelector::NotifyVarChange(const std::string& varName, const std::string& value)
 {
+	GUIScrollList::NotifyVarChange(varName, value);
+
 	if(!isConditionTrue())
 		return 0;
 
-	GUIScrollList::NotifyVarChange(varName, value);
-
 	if (varName.empty()) {
 		// Always clear the data variable so we know to use it
 		DataManager::SetValue(mVariable, "");

gui/listbox.cpp

@@ -122,11 +122,11 @@ int GUIListBox::Update(void)
 
 int GUIListBox::NotifyVarChange(const std::string& varName, const std::string& value)
 {
+	GUIScrollList::NotifyVarChange(varName, value);
+
 	if(!isConditionTrue())
 		return 0;
 
-	GUIScrollList::NotifyVarChange(varName, value);
-
 	// Check to see if the variable that we are using to store the list selected value has been updated
 	if (varName == mVariable) {
 		int i, listSize = mList.size();

gui/partitionlist.cpp

@@ -145,11 +145,11 @@ int GUIPartitionList::Update(void)
 
 int GUIPartitionList::NotifyVarChange(const std::string& varName, const std::string& value)
 {
+	GUIScrollList::NotifyVarChange(varName, value);
+
 	if(!isConditionTrue())
 		return 0;
 
-	GUIScrollList::NotifyVarChange(varName, value);
-
 	if (varName == mVariable && !mUpdate)
 	{
 		if (ListType == "storage") {