use __FILE__, not __BASE_FILE__

The intention was to use the file's basename, but __BASE_FILE__ means "the root
file that is being parsed and contains #include statements".

If we had a function using __BASE_FILE__ and that was defined in an #included
file, __BASE_FILE__ would indicate the first file where the #include is, and
not the file where the function is defined. __BASE_FILE__ works for us because
we don't ever include function definitions that log something, so __BASE_FILE__
always coincides with __FILE__ for our logging; but still __BASE_FILE__ is
semantically the wrong constant.

Related: OS#2740
Change-Id: Ic6d9dafc96c9d467ae53be2cd41adcf26a4e5125
diff --git a/include/osmocom/bsc/bsc_subscriber.h b/include/osmocom/bsc/bsc_subscriber.h
index a7b3e53..93b3539 100644
--- a/include/osmocom/bsc/bsc_subscriber.h
+++ b/include/osmocom/bsc/bsc_subscriber.h
@@ -37,8 +37,8 @@
 				   const char *file, int line);
 struct bsc_subscr *_bsc_subscr_put(struct bsc_subscr *bsub,
 				   const char *file, int line);
-#define bsc_subscr_get(bsub) _bsc_subscr_get(bsub, __BASE_FILE__, __LINE__)
-#define bsc_subscr_put(bsub) _bsc_subscr_put(bsub, __BASE_FILE__, __LINE__)
+#define bsc_subscr_get(bsub) _bsc_subscr_get(bsub, __FILE__, __LINE__)
+#define bsc_subscr_put(bsub) _bsc_subscr_put(bsub, __FILE__, __LINE__)
 
 void log_set_filter_bsc_subscr(struct log_target *target,
 			       struct bsc_subscr *bsub);