Fix typo causing compile error with NULL cipher
diff --git a/library/cipher_wrap.c b/library/cipher_wrap.c
index 47a69a9..ab2f9bc 100644
--- a/library/cipher_wrap.c
+++ b/library/cipher_wrap.c
@@ -1313,7 +1313,7 @@
 
 static void * null_ctx_alloc( void )
 {
-    return( (void *) 1 )
+    return( (void *) 1 );
 }
 
 static void null_ctx_free( void *ctx )