backslash is technically not allowed in "echo" arguments; thanks to D…

…ebian Bug#486046 for pointing out problem and solution (and Raphael Geissert and Vincent Zweije, in particular)

[empty commit message]

tools/fftw-wisdom-to-conf.in

@@ -64,7 +64,7 @@ void ${prefix}configure_planner(void *plnr)
 EOF
 
 sed 's/ *(//' | cut -d" " -f1 | grep -v -- - | egrep -v '^ *\)*$' | sort | uniq | while read reg_nam; do
-    echo "    X($reg_nam)\\"
+    printf '    X(%s)\\\n' "$reg_nam"
 done
 
 cat <<EOF