[ocrfeeder] Force values >= 0 for the DataHolder.Box's x and y

[Joaquim Manuel Pereira Rocha <jrocha src gnome org>]

commit f17db25d4602361284993be6c68735530f8a5469
Author: Joaquim Rocha <me joaquimrocha com>
Date:   Sun Dec 21 23:59:54 2014 +0000

    Force values >= 0 for the DataHolder.Box's x and y

 src/ocrfeeder/studio/dataHolder.py |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/src/ocrfeeder/studio/dataHolder.py b/src/ocrfeeder/studio/dataHolder.py
index 3a0c6a5..2821960 100644
--- a/src/ocrfeeder/studio/dataHolder.py
+++ b/src/ocrfeeder/studio/dataHolder.py
@@ -87,11 +87,11 @@ class DataBox(GObject.GObject):
         self.text_data = TextData(face, size, justification, line_space, letter_space)
 
     def setX(self, new_x):
-        self.x = new_x
+        self.x = max(0, new_x)
         self.emit('changed_x', self.x)
 
     def setY(self, new_y):
-        self.y = new_y
+        self.y = max(0, new_y)
         self.emit('changed_y', self.y)
 
     def setWidth(self, new_width):