Add function to Print to print only stack.

src/core/org/luaj/vm2/Print.java

@@ -405,7 +405,11 @@ public class Print extends Lua {
 		ps.close();
 		ps = previous;
 		format( baos.toString(), 50 );
+		printStack(stack, top, varargs);
+		ps.println();
+	}
 
+	public static void printStack(LuaValue[] stack, int top, Varargs varargs) {
 		// print stack
 		ps.print('[');
 		for ( int i=0; i<stack.length; i++ ) {
@@ -440,9 +444,6 @@ public class Print extends Lua {
 			ps.print( " | " );
 		}
 		ps.print(varargs);
-		ps.println();
-	}
-
-	
+	}	
 
 }