declare par time arrays as static const (#1363)

src/doom/g_game.c

@@ -1303,7 +1303,7 @@ void G_ScreenShot (void)
 
 
 // DOOM Par Times
-int pars[4][10] = 
+static const int pars[4][10] =
 { 
     {0}, 
     {0,30,75,120,90,165,180,180,30,165}, 
@@ -1312,7 +1312,7 @@ int pars[4][10] =
 }; 
 
 // DOOM II Par Times
-int cpars[32] =
+static const int cpars[32] =
 {
     30,90,120,120,90,150,120,120,270,90,	//  1-10
     210,150,150,150,210,150,420,150,210,150,	// 11-20
@@ -1321,7 +1321,7 @@ int cpars[32] =
 };
 
 // Chex Quest Par Times
-int chexpars[6] = 
+static const int chexpars[6] =
 { 
     0,120,360,480,200,360
 };