Revert "Instead of passing exitcode, exit with 1."

This reverts commit 919d914.

This was done in the hopes to fix http://bugs.jruby.org/7031 but it
didn't work.

Author: BanzaiMan

ng.c

@@ -96,9 +96,6 @@
 #define CHUNKTYPE_EXIT 'X'
 #define CHUNKTYPE_STARTINPUT 'S'
 
-// jruby-launcher specific constant
-#define JRUBY_EXIT_EXCEPTION (1)
-
 /*
    the following is required to compile for hp-ux
    originally posted at http://jira.codehaus.org/browse/JRUBY-2346
@@ -327,9 +324,6 @@ void processExit(char *buf, unsigned long len) {
   buf[bytesRead] = 0;
 
   exitcode = atoi(buf);
-  if (exitcode != 0) {
-    exitcode = JRUBY_EXIT_EXCEPTION;
-  }
 
   cleanUpAndExit(exitcode);
 }