journal-file: fix meaning less assertion

Closes CID#1609495.

Author: yuwata

src/libsystemd/sd-journal/journal-file.c

@@ -4070,8 +4070,7 @@ int journal_file_open(
         int r;
 
         assert(fd >= 0 || fname);
-        assert(file_flags >= 0);
-        assert(file_flags <= _JOURNAL_FILE_FLAGS_MAX);
+        assert((file_flags & ~_JOURNAL_FILE_FLAGS_ALL) == 0);
         assert(mmap_cache);
         assert(ret);
 

src/libsystemd/sd-journal/journal-file.h

@@ -132,7 +132,7 @@ typedef enum JournalFileFlags {
         JOURNAL_COMPRESS        = 1 << 0,
         JOURNAL_SEAL            = 1 << 1,
         JOURNAL_STRICT_ORDER    = 1 << 2,
-        _JOURNAL_FILE_FLAGS_MAX = JOURNAL_COMPRESS|JOURNAL_SEAL|JOURNAL_STRICT_ORDER,
+        _JOURNAL_FILE_FLAGS_ALL = JOURNAL_COMPRESS|JOURNAL_SEAL|JOURNAL_STRICT_ORDER,
 } JournalFileFlags;
 
 typedef struct {