Always report a non-zero error level when there is an error.

This is necessary to make the "compile" command halt and not process additional source files, as well as to make occ stop and not run the linker.

Previously, this was not happening when the #error directive was used, or when an undefined label was used in a goto.

This addressed the issue with the compco07.c test case.

CC.pas

@@ -165,8 +165,11 @@ if numErrors = 0 then begin             {set up the return parameters}
       liDCBGS.sFile := @outFileGS;
       end; {if}
    end {if}
-else
+else begin
    liDCBGS.lops := 0;
+   if liDCBGS.merrf = 0 then
+      liDCBGS.merrf := 16;
+   end; {else}
 MMQuit;                                 {dispose of our memory pools}
 with liDCBGS do begin			{return to the shell}
    sFile := pointer(ord4(sFile)+2);