[folks] Add checks for memset() and strstr()

[Philip Withnall <pwithnall src gnome org>]

commit 1781654659c6590365dce68b19f36e2b46fbf484
Author: Philip Withnall <philip withnall collabora co uk>
Date:   Thu Aug 26 14:44:10 2010 +0100

    Add checks for memset() and strstr()
    
    According to `autoscan`, these are used by some of the generated C code, and
    should be checked for at configure time.

 configure.ac |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index ebdf4fa..83b1266 100644
--- a/configure.ac
+++ b/configure.ac
@@ -115,6 +115,10 @@ VALA_CHECK_PACKAGES([telepathy-glib
                     gio-2.0
                     gee-1.0])
 
+# Various functions that we need (used in C code generated from Vala)
+AC_CHECK_FUNCS([memset])
+AC_CHECK_FUNCS([strstr])
+
 # -----------------------------------------------------------
 # Backends
 # -----------------------------------------------------------