libflash/test/test-blocklevel: fix memory leak on exit

==8304==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 4096 byte(s) in 1 object(s) allocated from:
    #0 0x7f70eda8f850 in malloc (/lib64/libasan.so.4+0xde850)
    #1 0x408ba0 in main libflash/test/test-blocklevel.c:298
    #2 0x7f70ec8e1509 in __libc_start_main (/lib64/libc.so.6+0x20509)

Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/libflash/test/test-blocklevel.c b/libflash/test/test-blocklevel.c
index cbf7413..3787cd6 100644
--- a/libflash/test/test-blocklevel.c
+++ b/libflash/test/test-blocklevel.c
@@ -434,5 +434,7 @@ int main(void)
 		return 1;
 	}
 
+	free(buf);
+
 	return 0;
 }