example/ssh2_agent: Print host key fingerprint before authentication

Also moves the comment about not being authenticated to before the
agent authentication takes place, so that it better matches the code.

example/ssh2_agent.c

@@ -99,6 +99,18 @@ int main(int argc, char *argv[])
         return 1;
     }
 
+    /* At this point we havn't authenticated. The first thing to do is check
+     * the hostkey's fingerprint against our known hosts Your app may have it
+     * hard coded, may go to a file, may present it to the user, that's your
+     * call
+     */
+    fingerprint = libssh2_hostkey_hash(session, LIBSSH2_HOSTKEY_HASH_SHA1);
+    printf("Fingerprint: ");
+    for(i = 0; i < 20; i++) {
+        printf("%02X ", (unsigned char)fingerprint[i]);
+    }
+    printf("\n");
+
     /* check what authentication methods are available */
     userauthlist = libssh2_userauth_list(session, username, strlen(username));
     printf("Authentication methods: %s\n", userauthlist);
@@ -151,17 +163,7 @@ int main(int argc, char *argv[])
         goto shutdown;
     }
 
-    /* At this point we havn't authenticated. The first thing to do is check
-     * the hostkey's fingerprint against our known hosts Your app may have it
-     * hard coded, may go to a file, may present it to the user, that's your
-     * call
-     */
-    fingerprint = libssh2_hostkey_hash(session, LIBSSH2_HOSTKEY_HASH_SHA1);
-    printf("Fingerprint: ");
-    for(i = 0; i < 20; i++) {
-        printf("%02X ", (unsigned char)fingerprint[i]);
-    }
-    printf("\n");
+    /* We're authenticated now. */
 
     /* Request a shell */
     if (!(channel = libssh2_channel_open_session(session))) {