Merge pull request #4363 from stefan-it/replace-while-loops

basic,coredump: use for loop instead of while

src/basic/gunicode.c

@@ -26,7 +26,7 @@
 char *
 utf8_prev_char (const char *p)
 {
-  while (1)
+  for (;;)
     {
       p--;
       if ((*p & 0xc0) != 0x80)

src/coredump/coredump.c

@@ -589,7 +589,7 @@ static int get_mount_namespace_leader(pid_t pid, pid_t *container_pid) {
         if (r < 0)
                 return r;
 
-        while (1) {
+        for (;;) {
                 ino_t parent_mntns;
 
                 r = get_process_ppid(cpid, &ppid);