shell32: Constify some variables.

dlls/shell32/trash.c

@@ -138,7 +138,7 @@ static BOOL TRASH_EnsureInitialized(void)
     return TRUE;
 }
 
-static BOOL file_good_for_bucket(TRASH_BUCKET *pBucket, struct stat *file_stat)
+static BOOL file_good_for_bucket(const TRASH_BUCKET *pBucket, const struct stat *file_stat)
 {
     if (pBucket->device != file_stat->st_dev)
         return FALSE;
@@ -486,7 +486,7 @@ static INT CALLBACK free_item_callback(void *item, void *lParam)
     return TRUE;
 }
 
-static HDPA enum_bucket_trashinfos(TRASH_BUCKET *bucket, int *count)
+static HDPA enum_bucket_trashinfos(const TRASH_BUCKET *bucket, int *count)
 {
     HDPA ret = DPA_Create(32);
     struct dirent *entry;

dlls/shell32/xdg.c

@@ -508,7 +508,7 @@ struct tagXDG_PARSED_FILE
     PARSED_GROUP *groups;
 };
 
-static BOOL parsed_str_eq(PARSED_STRING *str1, const char *str2)
+static BOOL parsed_str_eq(const PARSED_STRING *str1, const char *str2)
 {
     if (strncmp(str1->str, str2, str1->len) != 0)
         return FALSE;