fix(flash): Check for calloc failure

Co-authored-by: David Lechner <david@lechnology.com>

Author: JakubVanek

src/bl_install.c

@@ -261,6 +261,10 @@ static int bootloader_send(FILE *fp, int length, u32* pCrc32)
 int bootloader_crc(FILE *fp, u32 starting_sector, u32 num_sectors, bool verbose)
 {
 	u8 *firmware = calloc(FLASH_SIZE, 1);
+	if (!firmware) {
+		errmsg = "out of memory";
+		return ERR_NOMEM;
+	}
 	u32 read_bytes = fread(firmware, 1, FLASH_SIZE, fp);
 	if (ferror(fp)) {
 		errmsg = "Reading of firmware file failed";