Handle nil properly when no results are found

Author: wchen-r7

modules/auxiliary/gather/corpwatch_lookup_id.rb

@@ -83,7 +83,7 @@ def run
 
     elements = root.get_elements("result")
 
-    if elements == nil || elements.length == 0
+    if elements.blank? || elements.length == 0
       print_error("No results returned")
       return
     end

modules/auxiliary/gather/corpwatch_lookup_name.rb

@@ -102,7 +102,7 @@ def run
 
     elements = results.get_elements("companies")
 
-    if not elements
+    if elements.blank?
       print_error("No companies returned")
       return
     end