test: subsys: storage: flash_map: fix test of get sectors API

Test of f. flash_area_get_sectors was failing because parameter for
passing capacity of the sectors array was uninitialized.
This patch fix this bug.

Signed-off-by: Andrzej Puzdrowski <[email protected]>

Author: nvlsianpu

tests/subsys/storage/flash_map/src/main.c

@@ -43,6 +43,7 @@ void flash_map_test_case_2(void)
 
 	memset(wd, 0xa5, sizeof(wd));
 
+	sec_cnt = ARRAY_SIZE(fs_sectors);
 	rc = flash_area_get_sectors(FLASH_AREA_IMAGE_1, &sec_cnt, fs_sectors);
 	zassert_true(rc == 0, "flash_area_get_sectors failed");