sdl2: helpdlg.c NULL advance_label
S3_1, clang analyzer:
../../../../src/client/gui-sdl2/helpdlg.c:2079:23: warning: Access to field 'next' results in a dereference of a null pointer (loaded from variable 'advance_label') [core.NullDereference] advance_label = advance_label->next;
Patch also for S2_6 (but not for S3_0)
- Fixed advance-off-by-one error
S3_1, clang analyzer:
../../../../src/client/gui-sdl2/helpdlg.c:2079:23: warning: Access to field 'next' results in a dereference of a null pointer (loaded from variable 'advance_label') [core.NullDereference] advance_label = advance_label->next;