Merge pull request #23 from Vavency/master

Add relative seeking

workshop/gamemodes/cinema_modded/gamemode/modules/theater/sh_theater.lua

@@ -496,6 +496,9 @@ if SERVER then
 
 		if not IsVideoTimed(self:VideoType()) then return end
 
+		-- Get the plus or minus sign for later.
+		local frontsign = seconds[1] or ""
+
 		-- Seconds isn't a number, check HH:MM:SS
 		if not tonumber(seconds) then
 			local hr, min, sec = string.match(seconds, hhmmss)
@@ -512,6 +515,13 @@ if SERVER then
 				tonumber(sec)
 		end
 
+		-- If it's not one of those two things then it will fall trough wihtout any changes.
+		if frontsign == "+" then
+			seconds = self:VideoCurrentTime(true) + math.abs(seconds)
+		elseif frontsign == "-" then
+			seconds = self:VideoCurrentTime(true) - math.abs(seconds)
+		end
+
 		-- Clamp video seek time between 0 and video duration
 		seconds = math.Clamp(tonumber(seconds), 0, self:VideoDuration())