Add an enum for base material types.

library/include/dfhack/modules/Materials.h

@@ -668,6 +668,29 @@ namespace DFHack
         ~Materials();
         bool Finish();
 
+        enum base_material
+        {
+            INORGANIC,
+            AMBER,
+            CORAL,
+            GLASS_GREEN,
+            GLASS_CLEAR,
+            GLASS_CRYSTAL,
+            WATER,
+            COAL,
+            POTASH,
+            ASH,
+            PEARLASH,
+            LYE,
+            MUD,
+            VOMIT,
+            SALT,
+            FILTH_B,
+            FILTH_Y,
+            UNKNOWN_SUBSTANCE,
+            GRIME
+        };
+
         std::vector<df_inorganic_material*>* df_inorganic;
         std::vector<t_matglossInorganic> inorganic;
         std::vector<df_plant_type*>* df_organic;

plugins/drybuckets.cpp

@@ -64,7 +64,7 @@ DFhackCExport command_result df_drybuckets (Core * c, vector <string> & paramete
 	for (std::size_t i = 0; i < numItems; i++)
 	{
 		df_item *item = p_items[i];
-		if ((item->getType() == 72) && (item->getMaterial() == 6))
+		if ((item->getType() == Items::LIQUID_MISC) && (item->getMaterial() == Materials::WATER))
 		{
 			item->flags.garbage_colect = 1;
 			dried_total++;