[nautilus] build: support tracker 0.18

[Colin Walters <walters src gnome org>]

commit fc31f23705a960321010db48a4d048dc70b0eaf7
Author: Dominique Leuenberger <dimstar opensuse org>
Date:   Sat Nov 23 23:53:34 2013 +0100

    build: support tracker 0.18
    
    https://bugzilla.gnome.org/show_bug.cgi?id=715082

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 6819f7f..7348f06 100644
--- a/configure.ac
+++ b/configure.ac
@@ -249,7 +249,7 @@ AC_ARG_ENABLE(tracker,
               [enable_tracker=yes])
 
 if test "x$enable_tracker" != "xno"; then
-  PKG_CHECK_MODULES(TRACKER, tracker-sparql-0.16)
+  PKG_CHECK_MODULES(TRACKER, tracker-sparql-0.18)
   AC_DEFINE(ENABLE_TRACKER, 1, [Define to enable Tracker support])
 fi