Minor optimization for SectionReader.getpath

Author: blueyed

tox/config.py

@@ -985,9 +985,9 @@ def addsubstitutions(self, _posargs=None, **kw):
  self.posargs = _posargs
 
  def getpath(self, name, defaultpath, replace=True):
- toxinidir = self._subs['toxinidir']
  path = self.getstring(name, defaultpath, replace=replace)
  if path is not None:
+ toxinidir = self._subs['toxinidir']
  return toxinidir.join(path, abs=True)
 
  def getlist(self, name, sep="\n"):