fix various return type errors flagged by qfcc's new return type checking

ai.qc

@@ -1040,7 +1040,7 @@ float()	ShamCheckAttack;
 float() CheckAnyAttack =
 {
 	if (!enemy_vis)
-		return;
+		return #FALSE;
 	if (self.classname == "monster_demon1")
 		return DemonCheckAttack ();
 /*	else if (self.classname == "monster_army")

airfist.qc

@@ -39,7 +39,7 @@ $cd id1/progs/s_ablast
 $frame ablast1 ablast2 ablast3 ablast4 ablast5 ablast6
 
 
-void (entity thing) canairpush =
+float (entity thing) canairpush =
 {
 	if (thing.classname == "player")
 		return #TRUE;

pyro.qc

@@ -48,7 +48,7 @@ entity (string type, entity p_owner) FlameSpawn =
 		if (!(RemoveFlameFromQueue(type)))
 		{
 			// RPrint("Create flame failed: too many\n");
-			return;
+			return world;
 		}
 	}
 
@@ -121,7 +121,7 @@ float (string id_flame) RemoveFlameFromQueue =
 	if (num_world_flames < #FLAME_MAXWORLDNUM)
 	{
 		RPrint("ERROR in RemoveFlameFromQueue\n");
-		return;
+		return #FALSE;
 	}
 /*
 	db1 = ftos(num_world_flames);

sbitems.qc

@@ -22,7 +22,7 @@ void() CameraSwitchView;*/
 
 void() ConcussionGrenadeTouch;
 void() Security_Camera_Pain;
-float(float tno, entity ignore, string st) teamsprint;
+void(float tno, entity ignore, string st) teamsprint;
 void() TeamFortress_DetpackTouch;
 void() TeamFortress_DetpackCountDown;
 void() TeamFortress_DetpackExplode;

sentry.qc

@@ -644,7 +644,7 @@ float() Sentry_Fire =
 			WriteCoord (#MSG_BROADCAST, self.origin_z);
 			if (self.tf_items & #NIT_TURRET)
 				self.origin_z = self.origin_z + 40;
-			return;
+			return #FALSE;
 		}
 
 		newmis = spawn ();

status.qc

@@ -764,7 +764,7 @@ string(entity pl) ClipSizeToString100 =
 	}
 	else if (num >= 40)
 		return "\nãìéð:40";
-	return num;
+	return ftos (num);
 };
 //==========
 string(entity te) SentryDetailsToString =

tesla.qc

@@ -531,7 +531,7 @@ float() Tesla_Fire =
 		T_RadiusDamage(self, self, damg, world);
 		if (self.tf_items & #NIT_TURRET) self.origin_z = self.origin_z + 40; // 40
 		//else self.origin_z = self.origin_z - 24;
-		return;
+		return #FALSE;
 	}
 		
 	deathmsg = #DMSG_TESLA;

tfort.qc

@@ -2578,7 +2578,7 @@ float(entity Retriever, entity Items) TeamFortress_AddBackpackItems =
 	// weapons, then you may want them to be able to pick up weapons
 	// from backpacks. If so, this is where to do it.
 	// For now, return. 
-	return;
+	return 0;
 };
 
 //=========================================================================

tforttm.qc

@@ -1327,7 +1327,7 @@ float(float tno) TeamFortress_TeamIsCivilian =
 
 //=========================================================================
 // Sprints to all the members on one team except one 
-float(float tno, entity ignore, string st) teamsprint =
+void(float tno, entity ignore, string st) teamsprint =
 {
 	// Don't do teamprints in DM
 	if (tno == 0)