Try default constructors for Symbian.

Core/SaveState.cpp

@@ -335,7 +335,6 @@ namespace SaveState
 		std::string fn = GenerateSaveSlotFilename(slot, STATE_EXTENSION);
 		std::string shot = GenerateSaveSlotFilename(slot, SCREENSHOT_EXTENSION);
 		if (!fn.empty()) {
-#ifndef __SYMBIAN32__
 			auto renameCallback = [=](bool status, void *data) {
 				if (status) {
 					if (File::Exists(fn)) {
@@ -348,11 +347,8 @@ namespace SaveState
 				}
 			};
 			// Let's also create a screenshot.
-			SaveScreenshot(shot, nullptr, 0);
+			SaveScreenshot(shot, Callback(), 0);
 			Save(fn + ".tmp", renameCallback, cbUserData);
-#else
-			Save(fn, renameCallback, cbUserData);
-#endif
 		} else {
 			I18NCategory *s = GetI18NCategory("Screen");
 			osm.Show("Failed to save state. Error in the file system.", 2.0);