layout.c: Use calloc() to ensure a zeroed layout

No need to malloc() and then do a DIY memset to zero of the
heap. Just use calloc(1, ..) to get a zeroed heap.

Change-Id: Id6cf2c4591aec0620f15d8a39495d2bff6597f96
Signed-off-by: Edward O'Callaghan <quasisec@google.com>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/68279
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Felix Singer <felixsinger@posteo.net>
---
M layout.c
1 file changed, 18 insertions(+), 3 deletions(-)

diff --git a/layout.c b/layout.c
index 0212699..be88428 100644
--- a/layout.c
+++ b/layout.c
@@ -355,14 +355,12 @@
 
 int flashrom_layout_new(struct flashrom_layout **const layout)
 {
-	*layout = malloc(sizeof(**layout));
+	*layout = calloc(1, sizeof(**layout));
 	if (!*layout) {
 		msg_gerr("Error creating layout: %s\n", strerror(errno));
 		return 1;
 	}
 
-	const struct flashrom_layout tmp = { 0 };
-	**layout = tmp;
 	return 0;
 }
 

