Made geometry spec case insensitive.

lib/paperclip/geometry.rb

@@ -26,7 +26,7 @@ module Paperclip
 
     # Parses a "WxH" formatted string, where W is the width and H is the height.
     def self.parse string
-      if match = (string && string.match(/\b(\d*)x?(\d*)\b([\>\<\#\@\%^!])?/))
+      if match = (string && string.match(/\b(\d*)x?(\d*)\b([\>\<\#\@\%^!])?/i))
         Geometry.new(*match[1,3])
       end
     end

test/geometry_test.rb

@@ -49,6 +49,15 @@ class GeometryTest < Test::Unit::TestCase
       assert_nil @geo.modifier
     end
 
+    should "treat x and X the same in geometries" do
+      @lower = Paperclip::Geometry.parse("123x456")
+      @upper = Paperclip::Geometry.parse("123X456")
+      assert_equal 123, @lower.width
+      assert_equal 123, @upper.width
+      assert_equal 456, @lower.height
+      assert_equal 456, @upper.height
+    end
+
     ['>', '<', '#', '@', '%', '^', '!', nil].each do |mod|
       should "ensure the modifier #{mod.inspect} is preserved" do
         assert @geo = Paperclip::Geometry.parse("123x456#{mod}")