imap-send: fix memory leak in case auth_cram_md5 fails

This patch fixes a memory leak by running free(response) in case
auth_cram_md5 fails.

Signed-off-by: Aditya Garg <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: AdityaGarg8

imap-send.c

@@ -1046,8 +1046,10 @@ static int auth_cram_md5(struct imap_store *ctx, const char *prompt)
 	response = cram(prompt, ctx->cfg->user, ctx->cfg->pass);
 
 	ret = socket_write(&ctx->imap->buf.sock, response, strlen(response));
-	if (ret != strlen(response))
+	if (ret != strlen(response)) {
+		free(response);
 		return error("IMAP error: sending response failed");
+	}
 
 	free(response);