patch 8.0.0452: some macros are in lower case
Problem: Some macros are in lower case.
Solution: Make a few more macros upper case.
diff --git a/src/os_unix.c b/src/os_unix.c
index 69868ac..f0a5621 100644
--- a/src/os_unix.c
+++ b/src/os_unix.c
@@ -6139,7 +6139,7 @@
STRCAT(command, pat[0] + 1); /* exclude first backtick */
p = command + STRLEN(command) - 1;
*p-- = ')'; /* remove last backtick */
- while (p > command && vim_iswhite(*p))
+ while (p > command && VIM_ISWHITE(*p))
--p;
if (*p == '&') /* remove trailing '&' */
{