Fix compilation error introduced in my last patch for non-openbsd systems

git-svn-id: trunk@19468 -

rtl/bsd/ossysc.inc

@@ -542,6 +542,8 @@ begin
    { At least for openbsd, a positive return value is
      the length of the returned pchar }
    else if (ret<0) then
+{$else not opensd}
+   else
 {$endif openbsd}
      begin
        seterrno(-ret);