Add acelp_filters.o as QCELP decoder object file.

Originally committed as revision 22956 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/Makefile

@@ -260,7 +260,8 @@ OBJS-$(CONFIG_PPM_DECODER)             += pnmdec.o pnm.o
 OBJS-$(CONFIG_PPM_ENCODER)             += pnmenc.o pnm.o
 OBJS-$(CONFIG_PTX_DECODER)             += ptx.o
 OBJS-$(CONFIG_QCELP_DECODER)           += qcelpdec.o celp_math.o         \
-                                          celp_filters.o acelp_vectors.o
+                                          celp_filters.o acelp_vectors.o \
+                                          acelp_filters.o
 OBJS-$(CONFIG_QDM2_DECODER)            += qdm2.o mpegaudiodec.o            \
                                           mpegaudiodecheader.o mpegaudio.o \
                                           mpegaudiodata.o