silence error message before agent is installed

custompkg/root/etc/skel/Library/profile.d/900.gpg-agent.sh

@@ -9,6 +9,7 @@ ssh-add -L 2>/dev/null >/dev/null || rm -f $HOME/.gpg-agent-info
 
 # if no info file, start up potentially-new, working agent
 if [[ ! -e $HOME/.gpg-agent-info ]]; then
+    if which gpg-agent 2>&1 >/dev/null ; then
         gpg-agent \
             --enable-ssh-support \
             --daemon \
@@ -17,6 +18,7 @@ if [[ ! -e $HOME/.gpg-agent-info ]]; then
             --pinentry-program $(brew --prefix)/bin/pinentry-mac \
             2>&1 >/dev/null
     fi
+fi
 
 # load up new agent info
 if [[ -e $HOME/.gpg-agent-info ]]; then