util/broadcom: close file on error

Change-Id: I5193c6a9f08398b881c971c7175654ba5775b34a
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Found-by: Coverity Scan #1323509
Reviewed-on: https://review.coreboot.org/17876
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>

util/broadcom/secimage/io.c

@@ -81,6 +81,7 @@ int DataRead(char *filename, uint8_t *buf, int *length)
 	if (fread((uint8_t *)buf, 1, len, file) != len) {
 		printf("Error reading data (%d bytes) from file: %s\n",
 		       len, filename);
+		fclose(file);
 		return -1;
 	}
 	fclose(file);