put the old sigint handler back, fixes #2103

git-svn-id: file:///home/svn/framework3/trunk@9546 4d416f70-5f16-0410-b530-b9f4589650da

lib/rex/ui/text/irb_shell.rb

@@ -39,7 +39,7 @@ class IrbShell
 		IRB.conf[:MAIN_CONTEXT] = irb.context
 
 		# Trap interrupt
-		trap("SIGINT") do
+		old_sigint = trap("SIGINT") do
 			irb.signal_handle
 		end
 
@@ -47,9 +47,11 @@ class IrbShell
 		catch(:IRB_EXIT) do
 			irb.eval_input
 		end
+
+		trap("SIGINT", old_sigint)
 	end
 
 end
 end
 end
-end
+end