Improve swig build with help from Michael Forney.

Makefile

@@ -2,6 +2,7 @@ SUBDIRS = src/framework \
 		  src/mlt++ \
 		  src/melt \
 		  src/modules \
+		  src/swig \
 		  profiles
 
 all clean:

src/swig/Makefile

@@ -1,7 +1,7 @@
 include ../../config.mak
 include config.mak
 
-all clean depend install:
+all clean:
 	list='$(SUBDIRS)'; \
 	for subdir in $$list; do \
 		if [ -x $$subdir/build -a ! -f .$$subdir -o $@ = clean ] ; \
@@ -20,3 +20,7 @@ all clean depend install:
 			fi ; \
 		fi \
 	done
+
+depend:
+
+install:

src/swig/configure

@@ -20,10 +20,16 @@ else
 	do
 		case $i in
 			--swig-languages=* ) languages=${i#--swig-languages=}
+				[ "$languages" = "none" ] && languages=""
+				if [ -z "$languages" ]; then
+					echo SUBDIRS = $languages > config.mak
+					continue
+				fi
 				which swig > /dev/null 2>&1
 				[ $? != 0 ] && echo "Please install swig" && exit 1
 				[ "$languages" = "all" ] && languages="java lua perl php python ruby tcl"
-				echo SUBDIRS = ${i#--swig-languages=} > config.mak ;;
+				echo SUBDIRS = $languages > config.mak
+			;;
 		esac
 	done
 fi