[tracker] Don't make enca required without configure switches

[Philip Van Hoof <pvanhoof src gnome org>]

commit a8a1fb90345f562f3d05861b0e802bfbdf9525db
Author: Philip Van Hoof <philip codeminded be>
Date:   Fri Jan 22 18:33:03 2010 +0100

    Don't make enca required without configure switches

 configure.ac |    9 +++++----
 1 files changed, 5 insertions(+), 4 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index a117996..9117f78 100644
--- a/configure.ac
+++ b/configure.ac
@@ -210,19 +210,20 @@ AC_SUBST(UUID_LIBS)
 
 # Check for enca, detects defect Russian or Cyrillic language specifics in mp3s
 AC_ARG_WITH([enca],
-            AS_HELP_STRING([--with-enca], [build with enca]),,
+            AS_HELP_STRING([--with-enca], [build with enca]),[with_enca=no],
             [with_enca=yes])
 
 if test x$with_enca = xyes ; then
-   PKG_CHECK_MODULES(ENCA, [enca >= 1.9])
+   PKG_CHECK_MODULES(ENCA, [enca >= 1.9], have_enca=yes, have_enca=no)
 
    AC_SUBST(ENCA_CFLAGS)
    AC_SUBST(ENCA_LIBS)
 
-   AC_DEFINE(HAVE_ENCA, [], [Enca language detection aid])
+   if test x$have_enca == "xyes"; then
+     AC_DEFINE(HAVE_ENCA, [], [Enca language detection aid])
+   fi
 fi
 
-have_enca=$with_enca
 AM_CONDITIONAL(HAVE_ENCA, test "$have_enca" = "yes")
 
 AC_PATH_PROG(VALAC, valac, valac)