maint: avoid useless "if (foo) free(foo)" pattern

My Coccinelle semantic patch finds a few more, because it also fixes up
the equally pointless conditional

    if (foo) {
        free(foo);
        foo = NULL;
    }

Result (feel free to squash it into your patch):

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

1 files changed, 2 insertions, 4 deletions

diff --git a/hw/char/exynos4210_uart.c b/hw/char/exynos4210_uart.c
index 7614e5860f..215f9622c9 100644
--- a/hw/char/exynos4210_uart.c
+++ b/hw/char/exynos4210_uart.c
@@ -234,10 +234,8 @@ static int fifo_empty_elements_number(Exynos4210UartFIFO *q)
 
 static void fifo_reset(Exynos4210UartFIFO *q)
 {
-    if (q->data != NULL) {
-        g_free(q->data);
-        q->data = NULL;
-    }
+    g_free(q->data);
+    q->data = NULL;
 
     q->data = (uint8_t *)g_malloc0(q->size);