Fix char signedness issue in bidi code

* src/dispextern.h (struct bidi_t): Change type of resolved_level
and isolate_level to signed char.  (Bug#22830)

diff --git a/src/dispextern.h b/src/dispextern.h
index 7d7d7305b43ac07b2176eb08f37d0e37dcb6ae56..00667c5a8faf5873f8828143a207c509da98583e 100644 (file)
--- a/src/dispextern.h
+++ b/src/dispextern.h
@@ -1973,8 +1973,8 @@ struct bidi_it {
                                   resolving weak and neutral types */
   bidi_type_t type_after_wn;   /* bidi type after overrides and Wn */
   bidi_type_t orig_type;       /* original bidi type, as found in the buffer */
-  char resolved_level;         /* final resolved level of this character */
-  char isolate_level;          /* count of isolate initiators unmatched by PDI */
+  signed char resolved_level;  /* final resolved level of this character */
+  signed char isolate_level;   /* count of isolate initiators unmatched by PDI */
   ptrdiff_t invalid_levels;    /* how many PDFs to ignore */
   ptrdiff_t invalid_isolates;  /* how many PDIs to ignore */
   struct bidi_saved_info prev; /* info about previous character */