updated for version 7.3.535
Problem: Many #ifdefs for MB_MAXBYTES.
Solution: Also define MB_MAXBYTES without the +multi_byte feature. Fix
places where the buffer didn't include space for a NUL byte.
diff --git a/src/vim.h b/src/vim.h
index 5cd5e30..d63551d 100644
--- a/src/vim.h
+++ b/src/vim.h
@@ -1703,6 +1703,8 @@
* character of up to 6 bytes, or one 16-bit character of up to three bytes
* plus six following composing characters of three bytes each. */
# define MB_MAXBYTES 21
+#else
+# define MB_MAXBYTES 1
#endif
#if (defined(FEAT_PROFILE) || defined(FEAT_RELTIME)) && !defined(PROTO)
@@ -2017,6 +2019,7 @@
#pragma warning(disable : 4312)
#endif
+/* Note: a NULL argument for vim_realloc() is not portable, don't use it. */
#if defined(MEM_PROFILE)
# define vim_realloc(ptr, size) mem_realloc((ptr), (size))
#else