Handle null blobs properly in sqlite, closes #1306

lib/dialects/sqlite/query.js

@@ -111,7 +111,9 @@ module.exports = (function() {
                   result[name] = new Date(val+'Z') // Z means UTC
                   result[name] = new Date(val+'Z') // Z means UTC
                 }
                 }
               } else if (metaData.columnTypes[name].lastIndexOf('BLOB') !== -1) {
               } else if (metaData.columnTypes[name].lastIndexOf('BLOB') !== -1) {
-                result[name] = new Buffer(result[name])
+                if (result[name]) {
+                  result[name] = new Buffer(result[name])
+                }
               }
               }
             }
             }
           }
           }

test/dao-factory.test.js

@@ -1805,6 +1805,18 @@ describe(Support.getTestDialectTeaser("DAOFactory"), function () {
           })
           })
         })
         })
       })
       })
+
+      it("should work when the database returns null", function (done) {
+        var self = this
+        this.BlobUser.create({
+          // create a null column
+        }).success(function (user) {
+          self.BlobUser.find(user.id).success(function (user) {
+            expect(user.data).to.be.null
+            done()
+          })
+        })
+      })
     })
     })
 
 
     describe("strings", function () {
     describe("strings", function () {