Small bump of speex that is now rc1

Small update for png decoding library (memory leak fix mainly)

extras/contrib/src/packages.mak

@@ -80,7 +80,7 @@ THEORA_URL=http://downloads.xiph.org/releases/theora/libtheora-$(THEORA_VERSION)
 #THEORA_URL=$(VIDEOLAN)/testing/contrib/libtheora-$(THEORA_VERSION).tar.bz2
 FLAC_VERSION=1.2.1
 FLAC_URL=$(SF)/flac/flac-$(FLAC_VERSION).tar.gz
-SPEEX_VERSION=1.2beta3
+SPEEX_VERSION=1.2rc1
 SPEEX_URL=http://downloads.us.xiph.org/releases/speex/speex-$(SPEEX_VERSION).tar.gz
 SHOUT_VERSION=2.2.2
 SHOUT_URL=http://downloads.us.xiph.org/releases/libshout/libshout-$(SHOUT_VERSION).tar.gz
@@ -139,7 +139,7 @@ VCDIMAGER_VERSION=0.7.23
 VCDIMAGER_URL=$(GNU)/vcdimager/vcdimager-$(VCDIMAGER_VERSION).tar.gz
 CDIO_VERSION=0.80
 CDIO_URL=$(GNU)/libcdio/libcdio-$(CDIO_VERSION).tar.gz
-PNG_VERSION=1.2.29
+PNG_VERSION=1.2.30
 PNG_URL=$(SF)/libpng/libpng-$(PNG_VERSION).tar.bz2
 GPGERROR_VERSION=1.6
 GPGERROR_URL=$(VIDEOLAN)/testing/contrib/libgpg-error-$(GPGERROR_VERSION).tar.bz2