- check r_precache in all games.

source/games/duke/src/premap.cpp

@@ -858,6 +858,7 @@ static int LoadTheMap(MapRecord *mi, struct player_struct *p, int gamemode)
     allignwarpelevators();
     resetpspritevars(gamemode);
 
+    if (!r_precache) return 0;
     if (isRR()) cacheit_r(); else cacheit_d();
     return 0;
 }

source/games/duke/src/premap_r.cpp

@@ -407,6 +407,7 @@ static void cachegoodsprites(void)
 
 void cacheit_r(void)
 {
+	if (!r_precache) return;
 	int i;
 
 	cachegoodsprites();

source/games/exhumed/src/enginesubs.cpp

@@ -36,6 +36,8 @@ void resettiming()
 
 void precache()
 {
+    if (!r_precache) return;
+
     int i;
 
     for (i = 0; i < numsectors; i++)