libwine: Avoid comparing the result of pointer arithmetic to zero.

gcc warns about this: ../wine/libs/wine/mmap.c: In function ‘wine_mmap_add_reserved_area_obsolete’: ../wine/libs/wine/mmap.c:504:9: error: the comparison will always evaluate as ‘true’ for the pointer operand in ‘(char *)addr + (sizetype)size’ must not be NULL [-Werror=address] 504 | if (!((char *)addr + size)) size--; /* avoid wrap-around */ | ^

libwine: Avoid comparing the result of pointer arithmetic to zero.
d17fe0a7 · Zebediah Figura · Alexandre Julliard · 539ef7c4 · d17fe0a7
Commit d17fe0a7 authored Sep 15, 2022 by Zebediah Figura Committed by Alexandre Julliard Sep 16, 2022
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mmap.c libs/wine/mmap.c +2 -2

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--- a/libs/wine/mmap.c
+++ b/libs/wine/mmap.c
@@ -501,7 +501,7 @@ void wine_mmap_add_reserved_area_obsolete( void *addr, size_t size )
    struct reserved_area *area;
    struct list *ptr;

-    if (!((char *)addr + size)) size--;  /* avoid wrap-around */
+    if (!((intptr_t)addr + size)) size--;  /* avoid wrap-around */

    LIST_FOR_EACH( ptr, &reserved_areas )
    {
@@ -560,7 +560,7 @@ void wine_mmap_remove_reserved_area_obsolete( void *addr, size_t size, int unmap
    struct reserved_area *area;
    struct list *ptr;

-    if (!((char *)addr + size)) size--;  /* avoid wrap-around */
+    if (!((intptr_t)addr + size)) size--;  /* avoid wrap-around */

    ptr = list_head( &reserved_areas );
    /* find the first area covering address */