Fix apicheck empty file check
Ensures we run a last check correctly
BUG: 19478450
Change-Id: Ifdeca21ca0ec40d6c65d81c50208e4fc0b2509d7
diff --git a/apicheck.mk b/apicheck.mk
index 3437a82..b7aa05c 100644
--- a/apicheck.mk
+++ b/apicheck.mk
@@ -68,7 +68,7 @@
# Check that the API we're building hasn't broken the last-released SDK version
# if it exists
-ifdef $(last_released_sdk_$(support_module))
+ifneq ($(last_released_sdk_$(support_module)),)
$(eval $(call check-api, \
$(support_module)-checkapi-last, \
$(support_module_api_dir)/$(last_released_sdk_$(support_module)).txt, \