typo in error message

lib/bip32.js

@@ -329,7 +329,7 @@ BIP32.prototype.toString = function() {
 
 function uint(f, size) {
   if (f.length < size)
-    throw new Error('gcnot enough data');
+    throw new Error('not enough data');
   var n = 0;
   for (var i = 0; i < size; i++) {
     n *= 256;