* rtl/atari: fix haltproc external name. apparently the atari target uses a different Cprefix in the compiler, so copy-pasting this stuff from the Amiga port don't work 1:1

rtl/atari/system.pp

@@ -133,7 +133,7 @@ var
 {*****************************************************************************
                          System Dependent Exit code
 *****************************************************************************}
-procedure haltproc(e:longint); cdecl; external name '_haltproc';
+procedure haltproc(e:longint); cdecl; external name 'haltproc';
 
 Procedure system_exit;
 begin