strv: Fixup STRV_FOREACH_PAIR macro

The macro didn't properly parenthesize a caller-controlled argument.
For example: `STRV_FOREACH_PAIR(a, b, something ?: something_else)`
would expand to `typeof(*something ?: something_else)`, which would
cause compile failures

diff --git a/src/basic/strv.h b/src/basic/strv.h
index bd90305e63e097bdd098908b8943ae6d1bc23c74..d38d5bf538456a6042afd7ebe471523d15dc4a74 100644 (file)
--- a/src/basic/strv.h
+++ b/src/basic/strv.h
@@ -153,7 +153,7 @@ bool strv_overlap(char * const *a, char * const *b) _pure_;
         _STRV_FOREACH_BACKWARDS(s, l, UNIQ_T(h, UNIQ), UNIQ_T(i, UNIQ))
 
 #define _STRV_FOREACH_PAIR(x, y, l, i)                          \
-        for (typeof(*l) *x, *y, *i = (l);                       \
+        for (typeof(*(l)) *x, *y, *i = (l);                     \
              i && *(x = i) && *(y = i + 1);                     \
              i += 2)