install: unbreak installation with Python 3.7 (os.errno)

The os.errno module has not been an official feature. Python 3.7
removed the corresponding import. This broke the installation of
decoders. Prefer 'errno' over 'os.errno'.

diff --git a/tools/install-decoders b/tools/install-decoders
index 3772bd5aefbc108b0698c3645d57bfe0ad7e0e46..30360dbd9e5515d5c37adc6aac4a2485f9159053 100755 (executable)
--- a/tools/install-decoders
+++ b/tools/install-decoders
@@ -18,6 +18,7 @@
 ## along with this program; if not, see <http://www.gnu.org/licenses/>.
 ##
 
+import errno
 import os
 import sys
 from shutil import copy
@@ -64,7 +65,7 @@ def install(srcdir, dstdir, s):
         try:
             os.mkdir(pd_dst)
         except OSError as e:
-            if e.errno != os.errno.EEXIST:
+            if e.errno != errno.EEXIST:
                 raise
             else:
                 pass