journal: make check-pointer-deref clean

Add the needed assert changes to make the code clean
for the new check-pointer-deref script.

meson.build

@@ -2979,7 +2979,6 @@ if spatch.found()
         coccinelle_exclude = [
                 'src/basic/',
                 'src/core/',
-                'src/journal/',
                 'src/libsystemd/',
                 'src/network/',
                 'src/shared/',

src/journal/journald-audit.c

@@ -158,6 +158,8 @@ static int map_generic_field(
         char *c, *t;
         int r;
 
+        assert(p);
+
         /* Implements fallback mappings for all fields we don't know */
 
         for (e = *p; e < *p + 16; e++) {

src/journal/journald-manager.c

@@ -135,6 +135,8 @@ static int manager_determine_path_usage(
 }
 
 static void cache_space_invalidate(JournalStorageSpace *space) {
+        assert(space);
+
         zero(*space);
 }
 

src/journal/journald-native.c

@@ -45,6 +45,10 @@ static void manager_process_entry_meta(
                 char **message,
                 pid_t *object_pid) {
 
+        assert(priority);
+        assert(identifier);
+        assert(message);
+
         /* We need to determine the priority of this entry for the rate limiting logic */
 
         if (l == 10 &&
@@ -113,6 +117,8 @@ static int manager_process_entry(
         const char *p;
         int r = 1;
 
+        assert(remaining);
+
         p = buffer;
 
         while (*remaining > 0) {