handling for name/CAS not found

ChemID.py

@@ -89,6 +89,13 @@ def ResolveChemical(chemName, IDtype):
         im64 = None
         error = 4
 
+    # if we couldn't find a name or CAS (but do have SMILES)
+    if not error:
+        if not name:
+            name = 'Not found'
+        if not cas:
+            cas = 'Not found'
+
     return (name, cas, smiles, Mw, im64, error)
 
 #Generates an image of the molecule represented by the SMILES code given.