Add correct version number to shared libavfilter

Originally committed as revision 12341 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavfilter/Makefile

@@ -24,7 +24,7 @@ EXTRALIBS := -L$(BUILD_ROOT)/libavformat -lavformat$(BUILDSUF) $(EXTRALIBS)
 endif
 
 NAME=avfilter
-LIBVERSION=$(LAVFILTERVERSION)
-LIBMAJOR=$(LAVFILTERMAJOR)
+LIBVERSION=$(LAVFIVERSION)
+LIBMAJOR=$(LAVFIMAJOR)
 
 include ../common.mak