Revert "Cumulative patch from commit a9491695b30a7f750dc45cb563d813b03f1d4b8d"

This reverts commit bbcc4391bed89e8cd0dd235760cd2983f65721cf.

Bug: 34869019
Test: Load image and start soft AP

Change-Id: I85f39c134c1321d6a78f9f25a34f71ad7b1173fb
diff --git a/wpa_supplicant/bgscan_learn.c b/wpa_supplicant/bgscan_learn.c
index cb732f7..a320cc4 100644
--- a/wpa_supplicant/bgscan_learn.c
+++ b/wpa_supplicant/bgscan_learn.c
@@ -320,6 +320,9 @@
 {
 	const char *pos;
 
+	if (params == NULL)
+		return 0;
+
 	data->short_interval = atoi(params);
 
 	pos = os_strchr(params, ':');