Add cvar machinegun_norecoil

Add cvar machinegun_norecoil
This cvar allows to disable machinegun recoil in single player.
The default value is the original Quake 2 behaviour.

src/g_main.c

@@ -75,6 +75,7 @@ cvar_t *randomrespawn;
 cvar_t *g_disruptor;
 
 cvar_t *aimfix;
+cvar_t *machinegun_norecoil;
 
 void SpawnEntities(char *mapname, char *entities, char *spawnpoint);
 void ClientThink(edict_t *ent, usercmd_t *cmd);

src/header/local.h

@@ -634,6 +634,7 @@ extern cvar_t *randomrespawn;
 extern cvar_t *g_disruptor;
 
 extern cvar_t *aimfix;
+extern cvar_t *machinegun_norecoil;
 
 /* this is for the count of monsters */
 #define ENT_SLOTS_LEFT \

src/player/weapon.c

@@ -1475,7 +1475,7 @@ Machinegun_Fire(edict_t *ent)
 	ent->client->kick_angles[0] = ent->client->machinegun_shots * -1.5;
 
 	/* raise the gun as it is firing */
-	if (!deathmatch->value)
+	if (!(deathmatch->value || machinegun_norecoil->value))
 	{
 		ent->client->machinegun_shots++;
 

src/savegame/savegame.c

@@ -259,6 +259,7 @@ InitGame(void)
 
 	/* others */
 	aimfix = gi.cvar("aimfix", "0", CVAR_ARCHIVE);
+	machinegun_norecoil = gi.cvar("machinegun_norecoil", "0", CVAR_ARCHIVE);
 
 	/* items */
 	InitItems ();