Do not inhibit sym file generation if there is a segment directive before an #include.

This affected code like the following, causing stdio.h not to be represented in the sym file:

segment "S";
#include <stdio.h>
int main(void) {}

Parser.pas

@@ -3702,7 +3702,9 @@ var
       else
          segmentKind := 0;
       defaultSegmentKind := segmentKind;
+      inhibitHeader := lInhibitHeader;
       Match(semicolonch,22);
+      inhibitHeader := true;
       end {if}
    else begin
       Error(83);