Load videotestsrc twice as input-source and switch the active-pad above 0 cause crash.

To reproduce please do:

1. vi ButtonTest11.java

import org.gstreamer.*; 

public class ButtonTest11 
{
    public static Pipeline pipe = null;    
    public ButtonTest11() {}       
    
    public static void main(String[] args) 
    {
        Gst.init();        
        String vtest = 
                "videotestsrc pattern=18 ! queue ! s.sink0 videotestsrc pattern=1 ! queue ! s.sink1 input-selector name=s ! videoscale ! video/x-raw-yuv,width=340,height=200,framerate=90/1 ! xvimagesink name=gl";
        pipe = Pipeline.launch(vtest);  
        final Element videoSink = pipe.getElementByName("gl");         
        pipe.play();        
        try
        {                        
            final Element breakit = pipe.getElementByName("s");           
            //System.err.println(breakit.get("active-pad"));                
            breakit.set("active-pad", 1); // To produce the bug change the 0 to 1             
        } catch (Exception ex) {            
        }         
        Gst.main();        
    }
}

2. Compile/Run 
3. You will get similar crash

run:
Pad: [sink1]
#
# A fatal error has been detected by the Java Runtime Environment:
#
#  SIGSEGV (0xb) at pc=0x48c0de1d, pid=21200, tid=3077487472
#
# JRE version: 6.0_22-b22
# Java VM: OpenJDK Server VM (20.0-b11 mixed mode linux-x86 )
# Derivative: IcedTea6 1.10.3
# Distribution: Fedora release 15 (Lovelock), package fedora-59.1.10.3.fc15-i386
# Problematic frame:
# C  [libgobject-2.0.so.0+0xde1d]  g_free+0xde1d
#
# An error report file with more information is saved as:
# hs_err_pid21200.log
#
# If you would like to submit a bug report, please include
# instructions how to reproduce the bug and visit:
#   http://icedtea.classpath.org/bugzilla
# The crash happened outside the Java Virtual Machine in native code.
# See problematic frame for where to report the bug.
#
Java Result: 134
BUILD SUCCESSFUL (total time: 4 seconds)



Temporary: if i only keep 0 it works without crash. But with 0 real input source gets frozen.