tree-wide: use typesafe_qsort()

src/basic/process-util.c

@@ -1104,11 +1104,9 @@ void valgrind_summary_hack(void) {
 #endif
 }
 
-int pid_compare_func(const void *a, const void *b) {
-        const pid_t *p = a, *q = b;
-
+int pid_compare_func(const pid_t *a, const pid_t *b) {
         /* Suitable for usage in qsort() */
-        return CMP(*p, *q);
+        return CMP(*a, *b);
 }
 
 int ioprio_parse_priority(const char *s, int *ret) {