Fix typos in comments

data/tools/imgcheck

@@ -23,7 +23,7 @@ for filename in sys.argv[1:]:
         print "imgcheck: %s has no color table" % filename
     #img.close()
 
-# Perform cxolor table subtraction
+# Perform color table subtraction
 basecolors = map(lambda (n, rgb): rgb, colortables[0][1])
 basecolors.sort()
 subtracted = []

data/tools/trackplacer

@@ -666,7 +666,7 @@ class TracksEditor:
         screen_height = gtk.gdk.screen_height()
         if self.map_width < 0.75 * screen_width and self.map_height < 0.75 * screen_width:
             # Screen is large relative to the image.  Grab enough
-            # space to display the wntire map.  and never scroll.
+            # space to display the entire map.  and never scroll.
             # There should be enough space around the edges for window
             # decorations, task bars, etc.
             vbox.pack_start(self.drawing_area, expand=True, fill=True, padding=0)