[Padevex]

pawn Code:

for(new i=0; i<MAX_VEHICLES; i++) 
{ 
        if(IsPlayerNearVehicle(playerid, i, 2) && IsLSFMDVehicle(i)) 
        { 
                ambulance++; 
                if(ContainStretcher[i]) ambstretcher++; 
        } 
} 
if(ambulance < 0) return SendClientMessage(playerid, COLOR_GREY, "You are not near any ambulance.");

I'm going to assume that you have

pawn Code:

new ambulance;

somewhere there too?