Fixed typo in spawn(), when dup2:ing stderr

Rev: lib/modules/Process.pmod:1.5

lib/modules/Process.pmod

@@ -41,7 +41,7 @@ varargs int spawn(string s,object stdin,object stdout,object stderr)
       stdout->dup2(File("stdout"));
 
     if(stderr)
-      stderr->dup2(File,"stderr");
+      stderr->dup2(File("stderr"));
     
     exec("/bin/sh","-c",s);
     exit(69);