libsepol/cil: Initialize the multiple_decls field of the cil db

Initialize the multiple_decls field when intializing the structure
cil_db.

Fixes: fafe4c2 ("libsepol: cil: Add ability to redeclare types[attributes]")
Reported-by: Topi Miettinen <toiwoton@gmail.com
Acked-by: Stephen Smalley <stephen.smalley.work@gmail.com>
Signed-off-by: James Carter <jwcart2@gmail.com>

libsepol/cil/src/cil.c

@@ -459,6 +459,7 @@ void cil_db_init(struct cil_db **db)
 	(*db)->preserve_tunables = CIL_FALSE;
 	(*db)->handle_unknown = -1;
 	(*db)->mls = -1;
+	(*db)->multiple_decls = CIL_FALSE;
 	(*db)->target_platform = SEPOL_TARGET_SELINUX;
 	(*db)->policy_version = POLICYDB_VERSION_MAX;
 }