Merge pull request #2640 from FalseIncarnate/master

Random Chem Blacklists, Strange Plant Fixes

code/modules/reagents/Chemistry-Holder.dm

@@ -22,6 +22,8 @@ var/const/INGEST = 2
 		for(var/path in paths)
 			var/datum/reagent/D = new path()
 			chemical_reagents_list[D.id] = D
+			if(!D.can_grow_in_plants)
+				plant_blocked_chems.Add(D.id)
 	if(!chemical_reactions_list)
 		//Chemical Reactions - Initialises all /datum/chemical_reaction into a list
 		// It is filtered into multiple lists within a list.

code/modules/reagents/oldchem/reagents/_reagent_base.dm

@@ -12,6 +12,7 @@
 	var/color = "#000000" // rgb: 0, 0, 0 (does not support alpha channels - yet!)
 	var/shock_reduction = 0
 	var/penetrates_skin = 0 //Whether or not a reagent penetrates the skin
+	var/can_grow_in_plants = 1	//Determines if the reagent can be grown in plants, 0 means it cannot be grown
 	//Processing flags, defines the type of mobs the reagent will affect
 	//By default, all reagents will ONLY affect organics, not synthetics. Re-define in the reagent's definition if the reagent is meant to affect synths
 	var/process_flags = ORGANIC

code/modules/reagents/oldchem/reagents/drink/reagents_alcohol.dm

@@ -6,6 +6,7 @@
 	reagent_state = LIQUID
 	nutriment_factor = 0 //So alcohol can fill you up! If they want to.
 	color = "#404030" // rgb: 64, 64, 48
+	can_grow_in_plants = 0	//Alcoholic drinks won't be grown in plants (would "water down" random seed chems too much)
 	var/datum/martial_art/drunk_brawling/F = new
 	var/dizzy_adj = 3
 	var/slurr_adj = 3