Make mongoc_optional_t method args const

Author: alcaeus

src/libmongoc/src/mongoc/mongoc-optional.c

@@ -24,14 +24,14 @@ mongoc_optional_init (mongoc_optional_t *opt)
 }
 
 bool
-mongoc_optional_is_set (mongoc_optional_t *opt)
+mongoc_optional_is_set (const mongoc_optional_t *opt)
 {
    BSON_ASSERT (opt);
    return opt->is_set;
 }
 
 bool
-mongoc_optional_value (mongoc_optional_t *opt)
+mongoc_optional_value (const mongoc_optional_t *opt)
 {
    BSON_ASSERT (opt);
    return opt->value;

src/libmongoc/src/mongoc/mongoc-optional.h

@@ -34,10 +34,10 @@ MONGOC_EXPORT (void)
 mongoc_optional_init (mongoc_optional_t *opt);
 
 MONGOC_EXPORT (bool)
-mongoc_optional_is_set (mongoc_optional_t *opt);
+mongoc_optional_is_set (const mongoc_optional_t *opt);
 
 MONGOC_EXPORT (bool)
-mongoc_optional_value (mongoc_optional_t *opt);
+mongoc_optional_value (const mongoc_optional_t *opt);
 
 MONGOC_EXPORT (void)
 mongoc_optional_set_value (mongoc_optional_t *opt, bool val);