(WIP) Point 1: step functions

src/Combat.cpp

@@ -38,6 +38,10 @@ int32_t Player::getID() {
     return iID;
 }
 
+void Player::step(time_t currTime) {
+    // no-op
+}
+
 int CombatNPC::takeDamage(EntityRef src, int amt) {
 
     /* REFACTOR: all of this logic is strongly coupled to mobs.
@@ -96,6 +100,10 @@ int32_t CombatNPC::getID() {
     return id;
 }
 
+void CombatNPC::step(time_t currTime) {
+    // stubbed
+}
+
 static std::pair<int,int> getDamage(int attackPower, int defensePower, bool shouldCrit,
                                          bool batteryBoost, int attackerStyle,
                                          int defenderStyle, int difficulty) {