support buffers as first parameter

fixes #108

issue is that we perform auto-detection of the parameter style based on
the type of the first parameter. if it is an object, we switch to the
object syntax. however, buffers are also objects, so we have to special
case them too like RegExp and Date.

src/statement.cc

@@ -215,7 +215,7 @@ template <class T> T* Statement::Bind(const Arguments& args, int start, int last
                 baton->parameters.push_back(BindParameter(array->Get(i), pos));
             }
         }
-        else if (!args[start]->IsObject() || args[start]->IsRegExp() || args[start]->IsDate()) {
+        else if (!args[start]->IsObject() || args[start]->IsRegExp() || args[start]->IsDate() || Buffer::HasInstance(args[start])) {
             // Parameters directly in array.
             // Note: bind parameters start with 1.
             for (int i = start, pos = 1; i < last; i++, pos++) {

test/issue-108.test.js

+var sqlite3 = require('..'),
+    assert = require('assert');
+
+describe('buffer', function() {
+    var db;
+    // before(function() {
+    // });
+
+    it('should insert blobs', function(done) {
+        db = new sqlite3.Database(':memory:');
+        db.serialize(function () {
+
+            db.run("CREATE TABLE lorem (info BLOB)");
+            var stmt = db.prepare("INSERT INTO lorem VALUES (?)");
+
+            stmt.on('error', function (err) {
+                throw err;
+            });
+
+            var buff = new Buffer(2);
+            stmt.run('a');
+            stmt.finalize();
+        });
+
+        db.close(done);
+
+    });
+});