lib/rspreadsheet/tools.rb in rspreadsheet-0.2.9 vs lib/rspreadsheet/tools.rb in rspreadsheet-0.2.10

@@ -9,10 +9,10 @@
   end
 
   # converts cell adress like 'F12' to pair od integers [row,col]
   def self.convert_cell_address_to_coordinates(*addr)
     if addr.length == 1
-      addr[0].match(/^([A-Za-z]{1,3})(\d{1,8})$/)
+      addr[0].to_s.match(/^([A-Za-z]{1,3})(\d{1,8})$/)
       colname = $~[1]
       rowname = $~[2].to_i
     elsif addr.length == 2
       a = addr[0]; b = addr[1]
       if a.kind_of?(Integer) and b.kind_of?(Integer) # most common case first
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