check before building for nftables

.travis.yml

@@ -56,11 +56,11 @@ script:
       make -f $MAKEFILE depend;
     fi
   - 'CONFIG_OPTIONS="--ipv6 --igd2" make -f $MAKEFILE -j3'
+  - make -f $MAKEFILE check
   - if [ "$TRAVIS_OS_NAME" = "linux" ] && [ "$PROJECT" = "miniupnpd" ]; then
       make -f Makefile.linux_nft clean ;
       make -f Makefile.linux_nft ;
     fi
-  - make -f $MAKEFILE check
   - 'if [ "$TRAVIS_OS_NAME" = "linux" ] && [ "$PROJECT" = "miniupnpd" ]; then make -f $MAKEFILE dox ; fi'
   - if [ "$PROJECT" = "miniupnpc" ]; then
       INSTALLPREFIX="$HOME/_pythonmodule" make -f $MAKEFILE pythonmodule;