Pass in actual character sdl saw into keypress functions

Previously you couldn't detect what shift+somekey would do on alternate keyboard layours.

Author: jacob1

src/lua/LegacyLuaAPI.cpp

@@ -438,7 +438,7 @@ int luacon_elementwrite(lua_State* l)
 }
 
 bool shortcuts = true;
-int luacon_keyevent(int key, int modifier, int event)
+int luacon_keyevent(int key, Uint16 character, int modifier, int event)
 {
 	int kycontinue = 1;
 	lua_State* l=luacon_ci->l;
@@ -456,7 +456,7 @@ int luacon_keyevent(int key, int modifier, int event)
 	for (int i = 1; i <= len && kycontinue; i++)
 	{
 		lua_rawgeti(l, -1, i);
-		lua_pushlstring(l, (const char*)&key, 1);
+		lua_pushlstring(l, (const char*)&character, 1);
 		lua_pushinteger(l, key);
 		lua_pushinteger(l, modifier);
 		lua_pushinteger(l, event);

src/lua/LuaScriptHelper.h

@@ -23,7 +23,7 @@ extern int tptParts, tptPartsMeta, tptElementTransitions, tptPartsCData, tptPart
 void luacon_hook(lua_State *L, lua_Debug *ar);
 int luacon_step(int mx, int my);
 int luacon_mouseevent(int mx, int my, int mb, int event, int mouse_wheel);
-int luacon_keyevent(int key, int modifier, int event);
+int luacon_keyevent(int key, Uint16 character, int modifier, int event);
 int luacon_eval(const char *command);
 const char *luacon_geterror();
 void luacon_close();

src/lua/LuaScriptInterface.cpp

@@ -3305,7 +3305,7 @@ bool LuaScriptInterface::OnMouseWheel(int x, int y, int d)
 
 bool LuaScriptInterface::OnKeyPress(int key, Uint16 character, bool shift, bool ctrl, bool alt)
 {
-	return luacon_keyevent(key, GetModifiers(), LUACON_KDOWN);
+	return luacon_keyevent(key, character, GetModifiers(), LUACON_KDOWN);
 }
 
 bool LuaScriptInterface::OnKeyRelease(int key, Uint16 character, bool shift, bool ctrl, bool alt)
@@ -3317,7 +3317,7 @@ bool LuaScriptInterface::OnKeyRelease(int key, Uint16 character, bool shift, boo
 		modifiers |= 0x040;
 	if(alt)
 		modifiers |= 0x100;
-	return luacon_keyevent(key, modifiers, LUACON_KUP);
+	return luacon_keyevent(key, character, modifiers, LUACON_KUP);
 }
 
 bool LuaScriptInterface::OnMouseTick()