tree/: Make heap alloc checks err msg consistent

Change-Id: Id84a9f15c33781efc494ed36a1c7cec82a0333d6
Signed-off-by: Edward O'Callaghan <quasisec@google.com>
Original-Reviewed-on: https://review.coreboot.org/c/flashrom/+/69472
Original-Reviewed-by: Felix Singer <felixsinger@posteo.net>
Reviewed-on: https://review.coreboot.org/c/flashrom-stable/+/71497
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/flashrom.c b/flashrom.c
index 87bb7b0..234f135 100644
--- a/flashrom.c
+++ b/flashrom.c
@@ -388,7 +388,7 @@
 	const uint8_t erased_value = ERASED_VALUE(flash);
 
 	if (!cmpbuf) {
-		msg_gerr("Could not allocate memory!\n");
+		msg_gerr("Out of memory!\n");
 		exit(1);
 	}
 	memset(cmpbuf, erased_value, len);
@@ -418,7 +418,7 @@
 
 	uint8_t *readbuf = malloc(len);
 	if (!readbuf) {
-		msg_gerr("Could not allocate memory!\n");
+		msg_gerr("Out of memory!\n");
 		return -1;
 	}