let the user upload an image without touching the textarea, improved check in...

let the user upload an image without touching the textarea, improved check in Photo#process to not yield no method on nil error in some cases

app/models/photo.rb

@@ -101,7 +101,7 @@ class Photo < Post
   end
 
   def process
-    return false if unprocessed_image.path.include?('.gif') || self.processed?
+    return false if self.processed? || unprocessed_image.path.include?('.gif')
     processed_image.store!(unprocessed_image) #Ultra naive
     save!
   end

public/javascripts/publisher.js

@@ -272,9 +272,10 @@ var Publisher = {
   determineSubmitAvailability: function(){
     var onlyWhitespaces = (Publisher.input().val().trim() == '');
     var isSubmitDisabled = Publisher.submit().attr('disabled');
-    if (onlyWhitespaces && !isSubmitDisabled) {
+    var isPhotoAttached = ($("#photodropzone").children().length > 0)
+    if ((onlyWhitespaces &&  !isPhotoAttached) && !isSubmitDisabled) {
       Publisher.submit().attr('disabled', true);
-    } else if (!onlyWhitespaces && isSubmitDisabled) {
+    } else if ((!onlyWhitespaces || isPhotoAttached) && isSubmitDisabled) {
       Publisher.submit().removeAttr('disabled');
     }
   },