Forgot some references to the old jungletrees and conifers nodes

when I was weeding out the legacy names and textures.  This should fix
the last of it.

tree_models.lua

@@ -186,8 +186,8 @@ moretrees.jungletree_model={
 	axiom=nil,
 	rules_a=nil,
 	rules_b=nil,
-	trunk="default:jungletree",
-	leaves="jungletree:leaves_green",
+	trunk="moretrees:jungletree_trunk",
+	leaves="moretrees:jungletree_leaves_green",
 	leaves2=nil,
 	leaves2_chance=nil,
 	angle=45,
@@ -203,7 +203,7 @@ moretrees.conifer_model={
 	axiom="FFFAF[&&-F][&&+F][&&---F][&&+++F]Fff",
 	rules_a=nil,
 	rules_b=nil,
-	trunk="conifers:trunk",
+	trunk="moretrees:fir_trunk",
 	leaves=nil,
 	angle=45,
 	iterations=7,