Merge pull request #4 from pwighton/add_pet_freesurfer

PR FIX syntax:`os.join` --> `os.path.join`

Author: mnoergaard

nipype/interfaces/freesurfer/petsurfer.py

@@ -471,7 +471,7 @@ class MRTM(GLMFit):
 
     def _list_outputs(self):
         outputs = self.output_spec().get()
-        outputs['k2p'] = os.join(self.inputs.glm_dir, 'k2prime.dat')
+        outputs['k2p'] = os.path.join(self.inputs.glm_dir, 'k2prime.dat')
         return outputs
 
 class MRTM2InputSpec(GLMFitInputSpec):
@@ -576,4 +576,4 @@ def _list_outputs(self):
         else:
             ext = '.mgh'            
         outputs['bp'] = os.path.join(self.inputs.glm_dir, 'bp',  ext)
-        return outputs
+        return outputs