Merge pull request #175 from steinn/pyximport_fix

fix import of pyx modules when '' is in sys.path

pyximport/pyximport.py

@@ -291,11 +291,15 @@ class PyxImporter(object):
             paths = sys.path
         join_path = os.path.join
         is_file = os.path.isfile
+        is_abs = os.path.isabs
+        abspath = os.path.abspath
         #is_dir = os.path.isdir
         sep = os.path.sep
         for path in paths:
             if not path:
                 path = os.getcwd()
+            elif not is_abs(path):
+                path = abspath(path)
             if is_file(path+sep+pyx_module_name):
                 return PyxLoader(fullname, join_path(path, pyx_module_name),
                                  pyxbuild_dir=self.pyxbuild_dir,