Follow up to 323db7e

Fixes 2 compilation warnings

Thanks to @zEro-trap and Mael

src/map/pc.cpp

@@ -11534,7 +11534,7 @@ void pc_overheat(struct map_session_data *sd, int16 heat) {
 
 	if (sce) {
 		static std::vector<int16> limit = { 150, 200, 280, 360, 450 };
-		uint16 skill_lv = cap_value(pc_checkskill(sd, NC_MAINFRAME), 0, limit.size()-1);
+		uint16 skill_lv = cap_value(pc_checkskill(sd, NC_MAINFRAME), 0, (uint16)(limit.size()-1));
 
 		sce->val1 += heat;
 		sce->val1 = cap_value(sce->val1, 0, 1000);

src/map/status.cpp

@@ -14448,7 +14448,7 @@ TIMER_FUNC(status_change_timer){
 	case SC_OVERHEAT_LIMITPOINT:
 		if (--(sce->val1) >= 0) { // Cooling
 			static std::vector<int16> limit = { 150, 200, 280, 360, 450 };
-			uint16 skill_lv = (sd ? cap_value(pc_checkskill(sd, NC_MAINFRAME), 0, limit.size()-1) : 0);
+			uint16 skill_lv = (sd ? cap_value(pc_checkskill(sd, NC_MAINFRAME), 0, (uint16)(limit.size()-1)) : 0);
 
 			if (sc && sc->data[SC_OVERHEAT])
 				status_change_end(bl,SC_OVERHEAT,INVALID_TIMER);