implement wild card multiplier

(demo machines don't use it)
for 'n' wilds that contribute to a win,
multiply the line win * n * wild multiplier value

README.txt

@@ -221,6 +221,8 @@ winning combination is in your machine, that doesn't also contain any symbols
 in the wild_doesnt_match table (three or five [777]'s in the Golden 7's
 example machines).
 
+If a wild multiplier is in effect, it'll be applied to the final value for a
+given match.  
 
 DISCLAIMER:
 ===========

minislots_engine/engine.lua

@@ -110,11 +110,13 @@ function minislots.check_win(spin, def, maxlines)
 
 	for payline,paylineoffsets in ipairs(def.lines) do
 		local highestwin = nil
+		local wildcount = 0
 		if payline > maxlines then break end
 		paylinecontent[payline] = {}
 		for _,m in ipairs(def.matches) do
 
 			local matchwin = true
+			local wc = 0
 			for reel = 1, def.constants.numreels do
 				local row = paylineoffsets[reel]+2
 				if not m[reel+1] or type(m[reel+1]) == "string" then
@@ -128,6 +130,7 @@ function minislots.check_win(spin, def, maxlines)
 						matchwin = false
 						break
 					end
+					if spin[row][reel][2] == "wild" then wc = wc + 1 end
 				else 
 					local sublistmatch = false
 					for e in ipairs(m[reel+1]) do
@@ -139,15 +142,21 @@ function minislots.check_win(spin, def, maxlines)
 							sublistmatch = true
 						end
 					end
-					if not sublistmatch then matchwin = false break end
+					if not sublistmatch then
+						matchwin = false
+						break
+					end
+					if spin[row][reel][2] == "wild" then wc = wc + 1 end
 				end
 			end
 
 			if matchwin then
+				wildcount = wc
 				highestwin = m[1]
 			end
 		end
 		if highestwin then
+			if wildcount > 0 then highestwin = highestwin * wildcount * def.wild_multiplier end
 			table.insert(allwins, { payline = payline, value = highestwin, symbols = paylinecontent[payline]})
 		end
 	end

minislots_golden7s/init.lua

@@ -115,6 +115,9 @@ minislots.register_machine({
 	wild_doesnt_match = {
 		jackpot = true
 	},
+	wild_multiplier = 1,					-- For every wild that contributes to a line win, multiply win by this
+											-- (so one wild mult. by this, two mult. by twice this, etc)
+
 	geometry = {							-- all measures are in Minetest formspec "inventory slots" units
 
 		base_user_interface_width = 13,		-- width of the user interface

minislots_golden7s_deluxe/init.lua

@@ -146,6 +146,9 @@ minislots.register_machine({
 	wild_doesnt_match = {
 		jackpot = true
 	},
+	wild_multiplier = 1,					-- For every wild that contributes to a line win, multiply win by this
+											-- (so one wild mult. by this, two mult. by twice this, etc)
+
 	geometry = {							-- all measures are in Minetest formspec "inventory slots" units
 
 		base_user_interface_width = 14.667,	-- width of the user interface