Fixed an issue where a reagent map entry was being initialized with a null index value.

diff --git a/CauldronTradeskill.lua b/CauldronTradeskill.lua
index a951aae..c643c8f 100644
--- a/CauldronTradeskill.lua
+++ b/CauldronTradeskill.lua
@@ -159,7 +159,8 @@ function Cauldron:UpdateSkills()
 				end

 				-- populate the reagent list
-				for j=1,GetTradeSkillNumReagents(i) do
+				local num = GetTradeSkillNumReagents(i);
+				for j=1,num do
 					local rName, rIcon, rCount, _ = GetTradeSkillReagentInfo(i, j);
 --					Cauldron:info("UpdateSkills: i="..i..", j="..j..", rName="..tostring(rName)..", rIcon="..tostring(rIcon)..", rCount="..tostring(rCount));
 					local rLink = GetTradeSkillReagentItemLink(i, j);
@@ -170,7 +171,7 @@ function Cauldron:UpdateSkills()
 --					Cauldron:info("UpdateSkills: key="..tostring(key));

 					if (not rName) or (not rIcon) or (not rLink) then
-						Cauldron:error("Can't get name/icon/link for reagent! (skill: "..name..", reagentIndex: "..j..")");
+						Cauldron:error("Can't get name/icon/link for reagent! (skill: "..name..", reagentIndex: "..j..", name: "..rName..", icon: "..rIcon..", link: "..rLink..")");
 					end

 					local r = {
@@ -186,12 +187,13 @@ function Cauldron:UpdateSkills()
 					table.insert(skillDB.recipes[name].reagents, r);

 					-- add the reagent to the reagent map
-					if not self.db.realm.userdata[self.vars.playername].reagentMap[rName] then
-						self.db.realm.userdata[self.vars.playername].reagentMap[rName] = {};
-					end
-					table.insert(self.db.realm.userdata[self.vars.playername].reagentMap[rName], skillName..";"..recipeLink);

 					if rName then
+						if not self.db.realm.userdata[self.vars.playername].reagentMap[rName] then
+							self.db.realm.userdata[self.vars.playername].reagentMap[rName] = {};
+						end
+						table.insert(self.db.realm.userdata[self.vars.playername].reagentMap[rName], skillName..";"..recipeLink);
+
 --							Cauldron:info("adding to keywords: "..tostring(keywords));
 						keywords = keywords..","..rName;
 --							Cauldron:info("keywords="..tostring(keywords));