Prevent NPE during fetch and push via SSH

Bug: 340928
Change-Id: I870b77eeffa70a57891d7253a06ad7d44d808ee4
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>

org.eclipse.jgit/src/org/eclipse/jgit/transport/TransportGitSsh.java

@@ -290,6 +290,7 @@ public class TransportGitSsh extends SshTransport implements PackTransport {
 			}
 
 			super.close();
+			if (process != null)
 				process.destroy();
 		}
 	}
@@ -347,6 +348,7 @@ public class TransportGitSsh extends SshTransport implements PackTransport {
 			}
 
 			super.close();
+			if (process != null)
 				process.destroy();
 		}
 	}