[t2CharStringPen] always round the advance widths regardless of roundTolerance

hmtx only can have integer values, so it would be weird to have widths as float in CFF...

Lib/fontTools/pens/t2CharStringPen.py

@@ -67,7 +67,7 @@ class RelativeCoordinatePen(BasePen):
         raise NotImplementedError
 
 
-def makeRoundFuncs(tolerance):
+def makeRoundFunc(tolerance):
     assert 0 <= tolerance <= 0.5
 
     def _round(number):
@@ -83,22 +83,22 @@ def makeRoundFuncs(tolerance):
             # else return the value un-rounded
             return number
 
-    def _roundPoint(point):
+    def roundPoint(point):
         x, y = point
         return _round(x), _round(y)
 
-    return _round, _roundPoint
+    return roundPoint
 
 
 class T2CharStringPen(RelativeCoordinatePen):
 
     def __init__(self, width, glyphSet, roundTolerance=0.5):
         RelativeCoordinatePen.__init__(self, glyphSet)
-        self.round, self.roundPoint = makeRoundFuncs(roundTolerance)
+        self.roundPoint = makeRoundFunc(roundTolerance)
         self._heldMove = None
         self._program = []
         if width is not None:
-            self._program.append(self.round(width))
+            self._program.append(round(width))
 
     def _moveTo(self, pt):
         RelativeCoordinatePen._moveTo(self, self.roundPoint(pt))

Lib/fontTools/pens/t2CharStringPen_test.py

@@ -63,7 +63,7 @@ class T2CharStringPenTest(unittest.TestCase):
         charstring = pen.getCharString(None, None)
 
         self.assertAlmostEqualProgram(
-            [100.1,
+            [100,  # we always round the advance width
              0, 0, 'rmoveto',
              10.1, 0.1, 9.8, 9.8, 0.59, 10.59, 'rrcurveto',
              0, 10, -10.59, 9.41, -9.8, 0.2, 'rrcurveto',