script: Fix upper bounds

^ is the XOR operator.

scripts/pubkey_speed.c

@@ -56,7 +56,7 @@ int main(int argc, char *argv[])
 	}
 
 	rounds = atoi(argv[3]);
-	if (rounds < 0 || rounds > (2^26))
+	if (rounds < 0 || rounds > (1 << 26))
 	{	/* arbitrary limit to the number of chunk_t/sigs that fit into 1 GiB */
 		usage();
 	}