Demo replay fixes

Changes made/bugs fixed in this branch:

• Replay camera is now controllable when climbing (https://mb.srb2.org/showthread.php?t=38668), and in waterslides
• localangle (read: the angle between you and the camera, I think) now doesn't change during demo replays in most situations, unless the player is in analog mode. Exceptions include zoomtubes and NiGHTS super
• Replay camera now doesn't act silly if the player is in analog mode (assuming you also recorded it in that mode to begin with, anyway)

src/g_game.c

@@ -1009,10 +1009,10 @@ void G_BuildTiccmd(ticcmd_t *cmd, INT32 realtics)
}
if (cv_analog.value || twodlevel
|| (player->mo && (player->mo->flags2 & MF2_TWOD))
-		|| player->climbing
+		|| (!demoplayback && (player->climbing
|| (player->pflags & PF_NIGHTSMODE)
|| (player->pflags & PF_SLIDING)
-		|| (player->pflags & PF_FORCESTRAFE)) // Analog
+		|| (player->pflags & PF_FORCESTRAFE)))) // Analog
forcestrafe = true;
if (forcestrafe) // Analog
{
@@ -1184,8 +1184,9 @@ void G_BuildTiccmd(ticcmd_t *cmd, INT32 realtics)
if (!mouseaiming && cv_mousemove.value)
forward += mousey;
-	if (cv_analog.value || player->climbing
-		|| (player->pflags & PF_SLIDING)) // Analog for mouse
+	if (cv_analog.value ||
+		(!demoplayback && (player->climbing
+		|| (player->pflags & PF_SLIDING)))) // Analog for mouse
side += mousex*2;
else
cmd->angleturn = (INT16)(cmd->angleturn - (mousex*8));