Issue #15 - rfb.js: wait for security type list.

Apparently the virtualbox VNC server send the size and then the
security type list in separate frames so we need to wait for the full
list.

include/rfb.js

@@ -678,6 +678,11 @@ init_msg = function() {
     case 'Security' :
         if (rfb_version >= 3.7) {
             num_types = rQ[rQi++];
+            if (rQlen() < num_types) {
+                rQi--;
+                Util.Debug("   waiting for security types");
+                return;
+            }
             if (num_types === 0) {
                 strlen = rQshift32();
                 reason = rQshiftStr(strlen);
@@ -702,7 +707,7 @@ init_msg = function() {
             send_array([rfb_auth_scheme]);
         } else {
             if (rQlen() < 4) {
-                updateState('failed', "Invalid security frame");
+                Util.Debug("   waiting for security scheme bytes");
                 return;
             }
             rfb_auth_scheme = rQshift32();
@@ -717,7 +722,7 @@ init_msg = function() {
         switch (rfb_auth_scheme) {
             case 0:  // connection failed
                 if (rQlen() < 4) {
-                    //Util.Debug("   waiting for auth reason bytes");
+                    Util.Debug("   waiting for auth reason bytes");
                     return;
                 }
                 strlen = rQshift32();
@@ -734,7 +739,7 @@ init_msg = function() {
                     return;
                 }
                 if (rQlen() < 16) {
-                    //Util.Debug("   waiting for auth challenge bytes");
+                    Util.Debug("   waiting for auth challenge bytes");
                     return;
                 }
                 challenge = rQshiftBytes(16);