Implemented the FireResistence potion effects.

This not only provides fire resistence, but also prevents blaze fireballs.
See #2556

src/Entities/Pawn.cpp

@@ -61,6 +61,15 @@ void cPawn::KilledBy(TakeDamageInfo & a_TDI)
 
 
 
+bool cPawn::IsFireproof(void) const
+{
+	return super::IsFireproof() || HasEntityEffect(cEntityEffect::effFireResistance);
+}
+
+
+
+
+
 void cPawn::AddEntityEffect(cEntityEffect::eType a_EffectType, int a_Duration, short a_Intensity, double a_DistanceModifier)
 {
 	// Check if the plugins allow the addition:
@@ -98,6 +107,15 @@ void cPawn::RemoveEntityEffect(cEntityEffect::eType a_EffectType)
 
 
 
+bool cPawn::HasEntityEffect(cEntityEffect::eType a_EffectType) const
+{
+	return m_EntityEffects.find(a_EffectType) != m_EntityEffects.end();
+}
+
+
+
+
+
 void cPawn::ClearEntityEffects()
 {
 	// Iterate through this entity's applied effects