cameo/fped2stl.pl: hack: maintain decimal point across flipping

Since our regexps expect numbers to contain a decimal point, any result
that was an integer tripped the re-match after flipping. This hack works
around the problem by formatting the result such that it also has a decimal
point.

cameo/fped2stl.pl

@@ -100,7 +100,8 @@ for $z (keys %s) {
 	undef $t;
 	for $s (split(/\n/, $s{$z})) {
 		if ($s =~ /^(-?[0-9]*\.[0-9]*)\s+(-?[0-9]*\.[0-9]*)/) {
-			$s = (($xmax+$xmin)/2-$1)." $2" if $flip_y;
+			$s = sprintf("%.6f", ($xmax+$xmin)/2-$1)." $2"
+			    if $flip_y;
 
 			# re-scan, so that we can flip on both axes
 			die unless