configure.ac: Fix error when GUPnP is requested and not available

https://bugs.freedesktop.org/show_bug.cgi?id=90010

diff --git a/configure.ac b/configure.ac
index 1177209..d9728b7 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -284,7 +284,7 @@ if test "x$WANT_GUPNP" != "xno"; then
     [ HAVE_GUPNP=no ])
 fi
 if test "x$WANT_GUPNP" = "xyes" && test "x$HAVE_GUPNP" = "xno"; then
-   AC_MSG_ERROR(Requested GUPnP IGD, but it is not available)
+   AC_MSG_ERROR([Requested GUPnP IGD, but it is not available])
 fi
 
 if test "x$HAVE_GUPNP" = "xyes"; then