unicodeobject.c: Add MAX_MAXCHAR() macro to (micro-)optimize the computation of the second argument of PyUnicode_New().
unicodeobject.c: Add MAX_MAXCHAR() macro to (micro-)optimize the computation
of the second argument of PyUnicode_New().

 * Create also align_maxchar() function
 * Optimize fix_decimal_and_space_to_ascii(): don't compute the maximum
   character when ch <= 127 (it is ASCII)

sk-/python2.7-type-annotator,sk-/python2.7-type-annotator,sk-/python2.7-type-annotator