ref: gl: convert to usage of ref_host_t to get real engine time

ref/gl/gl_alias.c

@@ -1337,7 +1337,7 @@ static void R_AliasSetupTimings( void )
 	else
 	{
 		// menu stuff
-		g_alias.time = gpGlobals->realtime;
+		g_alias.time = gp_host->realtime;
 	}
 
 	m_fDoRemap = false;

ref/gl/gl_studio.c

@@ -180,8 +180,8 @@ static void R_StudioSetupTimings( void )
 	else
 	{
 		// menu stuff
-		g_studio.time = gpGlobals->realtime;
-		g_studio.frametime = gpGlobals->frametime;
+		g_studio.time = gp_host->realtime;
+		g_studio.frametime = gp_host->frametime;
 	}
 }
 
@@ -2772,7 +2772,7 @@ static void R_StudioClientEvents( void )
 		return;
 
 	end = R_StudioEstimateFrame( e, pseqdesc, g_studio.time );
-	start = end - e->curstate.framerate * gpGlobals->frametime * pseqdesc->fps;
+	start = end - e->curstate.framerate * gp_host->frametime * pseqdesc->fps;
 	pevent = (mstudioevent_t *)((byte *)m_pStudioHeader + pseqdesc->eventindex);
 
 	if( e->latched.sequencetime == e->curstate.animtime )