Be more pedantic for the theora library versions

(cherry picked from commit 22f92c93)
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

configure.ac

@@ -2798,7 +2798,7 @@ AM_CONDITIONAL([HAVE_SPEEXDSP], [test "$have_speexdsp" = "yes"])
 dnl
 dnl  theora decoder plugin
 dnl
-PKG_ENABLE_MODULES_VLC([THEORA], [], [ogg theora >= 1.0], [experimental theora codec], [auto])
+PKG_ENABLE_MODULES_VLC([THEORA], [], [ogg theoradec >= 1.0 theoraenc], [experimental theora codec], [auto])
 
 dnl
 dnl  dirac encoder plugin