Merge pull request #125 from jonhainstock/master

Closes #124

Author: tlancina

src/ios/IonicKeyboard.m

@@ -124,17 +124,19 @@ - (void) disableScroll:(CDVInvokedUrlCommand*)command {
       return;
     }
     id value = [command.arguments objectAtIndex:0];
-    
-    self.disableScroll = [value boolValue];
+    if (value != [NSNull null]) {
+      self.disableScroll = [value boolValue];
+    }
 }
 
 - (void) hideKeyboardAccessoryBar:(CDVInvokedUrlCommand*)command {
     if (!command.arguments || ![command.arguments count]){
       return;
     }
     id value = [command.arguments objectAtIndex:0];
-    
-    self.hideKeyboardAccessoryBar = [value boolValue];
+    if (value != [NSNull null]) {
+      self.hideKeyboardAccessoryBar = [value boolValue];
+    }
 }
 
 - (void) close:(CDVInvokedUrlCommand*)command {