[cheese] Bump pkg-config requirement to 0.24

[David King <davidk src gnome org>]

commit 21ca6f73016e12e321aeb8fdfad4399e127d4f78
Author: David King <amigadave amigadave com>
Date:   Sun Oct 30 12:01:15 2011 +0100

    Bump pkg-config requirement to 0.24
    
    Version 0.24 or greater of pkg-config is required in order to avoid the
    duplicate AC_SUBST macro calls for PKG_CHECK_MODULES substitutions.

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index a7c1a0d..977f9a0 100644
--- a/configure.ac
+++ b/configure.ac
@@ -24,7 +24,7 @@ AM_PROG_VALAC([0.12.0])
 LT_PREREQ([2.2])
 LT_INIT([disable-static])
 
-PKG_PROG_PKG_CONFIG([0.16])
+PKG_PROG_PKG_CONFIG([0.24])
 
 AC_SUBST([CHEESE_WFLAGS], ["-Wall -DGSEAL_ENABLE"])