[gtk+/gtk-3-22] build: Fix the check on sassc's presence

[Emmanuele Bassi <ebassi src gnome org>]

commit 1a489831b39d0c1583bd4d5e8583f65c1ba880e0
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Wed May 10 14:31:09 2017 +0100

    build: Fix the check on sassc's presence
    
    If sassc is not available we do not want to include the rules to
    regenerate the CSS out of the SCSS files.

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 05fdf4e..4e68e2d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1821,7 +1821,7 @@ AC_SUBST(GDK_HIDDEN_VISIBILITY_CFLAGS)
 
 AC_PATH_PROG([SASSC], [sassc])
 AC_ARG_VAR(SASSC)
-AM_CONDITIONAL([REBUILD_SCSS], [test "xSASSC" != x])
+AM_CONDITIONAL([REBUILD_SCSS], [test "x$SASSC" != x])
 
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