core: use unsigned long (j) for rpc core.shmmem

- GH #3450

(cherry picked from commit 94dd64a5238b4bf60ca21e09e216c01166f4a93f)

src/core/core_cmd.c

@@ -609,13 +609,13 @@ static void core_shmmem(rpc_t* rpc, void* c)
 	}
 	shm_info(&mi);
 	rpc->add(c, "{", &handle);
-	rpc->struct_add(handle, "dddddd",
-		"total", (unsigned int)(mi.total_size>>rs),
-		"free", (unsigned int)(mi.free_size>>rs),
-		"used", (unsigned int)(mi.used_size>>rs),
-		"real_used",(unsigned int)(mi.real_used>>rs),
-		"max_used", (unsigned int)(mi.max_used>>rs),
-		"fragments", (unsigned int)mi.total_frags
+	rpc->struct_add(handle, "jjjjjj",
+		"total", (mi.total_size>>rs),
+		"free", (mi.free_size>>rs),
+		"used", (mi.used_size>>rs),
+		"real_used", (mi.real_used>>rs),
+		"max_used", (mi.max_used>>rs),
+		"fragments", mi.total_frags
 	);
 }