dot2ruby.rb in ruby-graphviz-1.2.0

- old
+ new

@@ -22,10 +22,10 @@
   include GraphViz::Utils
 
   def initialize( xGVPath, xOutFile, xOutFormat = nil ) #:nodoc:
     paths = (xGVPath.nil?) ? [] : [xGVPath]
     @xGvprPath = find_executable( 'gvpr', paths )
-    if (@xGvprPath.blank?)
+    if(@xGvprPath.nil?)
       raise Exception, "GraphViz is not installed. Please be sure that 'gvpr' is on the search path'"
     end
     @xOutFile = xOutFile
     @xOutFormat = xOutFormat || "_"
     @gvprScript = GraphViz::Ext.find( "dot2ruby.g" )