travis: use devel version of net-snmp on OSX

The current stable version does not work with Mavericks. See:
 https://github.com/Homebrew/homebrew/issues/25097

diff --git a/.travis/install.sh b/.travis/install.sh
index a51bc2723523a578f1b0e5cb7facba7b18b7de33..2bfedcedd998158042da06cc403014b56812810a 100755 (executable)
--- a/.travis/install.sh
+++ b/.travis/install.sh
@@ -10,7 +10,8 @@ case "$(uname -s)" in
         brew update
         brew install \
             pkg-config autoconf automake libtool \
-            readline libevent net-snmp jansson libxml2 check
+            readline libevent jansson libxml2 check
+        brew install net-snmp --devel
         ;;
     *)
         # Linux