bugfix on the position of the frames

generator

@@ -60,19 +60,21 @@ def resize_image(filename, size):
 def generate_sprite_from_images(framesPath, columns, size, output):
     framesMap = sorted(glob.glob(framesPath + "*.png"))
     images = [Image.open(filename) for filename in framesMap]
-    print "%d frames will be combined." % len(images)
     masterWidth = size[0] * columns
     masterHeight = size[1] * int(math.ceil(float(len(images)) / columns))
     finalImage = Image.new(mode='RGBA', size=(masterWidth, masterHeight), color=(0,0,0,0))
     merge_frames(images, finalImage, columns, size, output)
 
 def merge_frames(images, finalImage, columns, size, output):
-    line = 0
-    for i, image in enumerate(images):
-        locationX = size[0] * i
+    line, column = 0, 0
+    for image in images:
+        locationX = size[0] * column
         locationY = size[1] * line
         finalImage.paste(image, (locationX, locationY))
-        if i != 0 and i % columns == 0: line += 1
+        column += 1
+        if column == columns:
+            line += 1
+            column = 0
 
     finalImage.save(output, transparency=0)
     shutil.rmtree(TMP_FRAMES_PATH, ignore_errors=True)