Fix Borland build.

src/xpdev/netwrap.c

@@ -268,14 +268,14 @@ isValidHostname(const char *str)
 bool
 isResolvableHostname(const char *str)
 {
-	if (!isValidHostname(str)) {
-		return false;
-	}
-
 	struct addrinfo hints = {0};
 	struct addrinfo *res = NULL;
 	const char portnum[2] = "1";
 
+	if (!isValidHostname(str)) {
+		return false;
+	}
+
 	hints.ai_flags = PF_UNSPEC;
 	hints.ai_family = PF_UNSPEC;
 	hints.ai_socktype = SOCK_STREAM;