[dunecontrol,bugfix] bugfix the bugfix and use the correct module name.

This completes the last patch by using $m for the module name. Finally,
installed modules are found correctly.
(cherry picked from commit 1526e275)

Signed-off-by: Markus Blatt <markus@dr-blatt.de>

bin/dunecontrol

@@ -643,7 +643,7 @@ run_default_configure () {
       if test -d "$path/$BUILDDIR"; then
         PARAMS="$PARAMS \"--with-$name=$path/$BUILDDIR\""
       else
-        if test x$(eval echo \$INST_$mod) != xyes; then
+        if test x$(eval echo \$INST_$m) != xyes; then
           PARAMS="$PARAMS \"--with-$name=$path\""
         fi
       fi