Fixed googless macro nil sheet key bug.

lib/google_docs_macros.rb

@@ -11,6 +11,7 @@ def self.googless_macro(googless_wiki_content, args, nohead=false)
     key = escape_javascript(CGI.unescape(args[0]))
 
 
+    sheet = "0"
     if args.length > 1
       # check to see if the second argument is a sheet. Otherwise, continue
       # assuming it's part of the query. @badidea
@@ -21,6 +22,8 @@ def self.googless_macro(googless_wiki_content, args, nohead=false)
       rescue ArgumentError
         querystart = 1
         sheet = "0"
+      rescue
+        raise "Invalid sheet code"
       end
 
       # Queries can have commas in them, which the macro thinks are extra macro arguments.
@@ -34,6 +37,9 @@ def self.googless_macro(googless_wiki_content, args, nohead=false)
 
   def self.render_spreadsheet(key, query, sheet="0", nohead=false)
 
+    if sheet.nil?
+      raise "Sheet is nil"
+    end
     sheet = sheet.strip()
 
     if nohead != "true"