Add cg_spawnEffects to disable spawn colorgrading since OSX doesn't like it

Author: DolceTriade

src/gamelogic/cgame/cg_local.h

@@ -1916,6 +1916,7 @@ extern vmCvar_t             cg_highPolyWeaponModels;
 extern vmCvar_t             cg_motionblur;
 extern vmCvar_t             cg_motionblurMinSpeed;
 extern vmCvar_t             ui_chatPromptColors;
+extern vmCvar_t             cg_spawnEffects;
 
 //
 // Rocket cvars

src/gamelogic/cgame/cg_main.c

@@ -285,6 +285,7 @@ vmCvar_t        cg_highPolyBuildableModels;
 vmCvar_t        cg_highPolyWeaponModels;
 vmCvar_t        cg_motionblur;
 vmCvar_t        cg_motionblurMinSpeed;
+vmCvar_t        cg_spawnEffects;
 
 vmCvar_t        cg_fov_builder;
 vmCvar_t        cg_fov_level0;
@@ -457,6 +458,7 @@ static const cvarTable_t cvarTable[] =
 	{ &cg_highPolyWeaponModels,        "cg_highPolyWeaponModels",        "1",            CVAR_LATCH                   },
 	{ &cg_motionblur,                  "cg_motionblur",                  "0.05",         CVAR_ARCHIVE                 },
 	{ &cg_motionblurMinSpeed,          "cg_motionblurMinSpeed",          "600",          0                            },
+	{ &cg_spawnEffects,                "cg_spawnEffects",                "1",            0                            },
 	{ &cg_fov_builder,                 "cg_fov_builder",                 "0",            0                            },
 	{ &cg_fov_level0,                  "cg_fov_level0",                  "0",            0                            },
 	{ &cg_fov_level1,                  "cg_fov_level1",                  "0",            0                            },

src/gamelogic/cgame/cg_view.c

@@ -1387,7 +1387,7 @@ static void CG_ChooseCgradingEffectAndFade( const playerState_t* ps, qhandle_t*
 	qboolean playing = team == TEAM_HUMANS || team == TEAM_ALIENS;
 
 	//the player has spawned once and is dead or in the intermission
-	if ( health <= 0 || (playing && cg.snap->ps.persistant[ PERS_SPECSTATE ] != SPECTATOR_NOT) )
+	if ( cg_spawnEffects.integer && ( health <= 0 || (playing && cg.snap->ps.persistant[ PERS_SPECSTATE ] != SPECTATOR_NOT) ) )
 	{
 		*effect = cgs.media.desaturatedCgrade;
 		*fade = 1.0;