Fixes parser error bug when trying to parse blank files

This fix is a little hokey but it'll do for now.

refs: zmoazeni#37

Author: zmoazeni

CHANGELOG.md

@@ -9,6 +9,7 @@
 * Fixes line/column output during parser errors
 * --compass now grabs config.rb by default if it exists
 * Adds --compass-with-config that lets users specify a config
+* Fixes parser error bug when trying to parse blank files
 
 ## 1.0.0 - 4/7/2013 ##
 

lib/csscss/cli.rb

@@ -42,11 +42,15 @@ def execute
           open(filename) {|f| f.read }
         end
 
-        RedundancyAnalyzer.new(contents).redundancies(
-          minimum:            @minimum,
-          ignored_properties: @ignored_properties,
-          ignored_selectors:  @ignored_selectors
-        )
+        if contents.strip.empty?
+          {}
+        else
+          RedundancyAnalyzer.new(contents).redundancies(
+            minimum:            @minimum,
+            ignored_properties: @ignored_properties,
+            ignored_selectors:  @ignored_selectors
+          )
+        end
       end
 
       combined_redundancies = all_redundancies.inject({}) do |combined, redundancies|