CustomIOS7AlertView.m死机问题修改

在适配ios7时需要用到自定义对话框，下载了CustomIOS7AlertView，使用时经常遇到程序死机崩溃，定位问题发现出在[CustomIOS7AlertView countScreenSize]这个函数的调用上。

百思不得其解，后来把[buttonTitles count]注释了才好。这才想起来，好像用的时候没有给buttonTitles赋值，用的默认的Close按钮，所以这里取不到数值，导致程序崩溃的。

以下是注释后的函数。

- (CGSize)countScreenSize
{
    // && [buttonTitles count] > 0
    if (buttonTitles!=NULL) {
        buttonHeight       = kCustomIOS7AlertViewDefaultButtonHeight;
        buttonSpacerHeight = kCustomIOS7AlertViewDefaultButtonSpacerHeight;
    } else {
        buttonHeight = 0;
        buttonSpacerHeight = 0;
    }
   
    CGFloat screenWidth = [UIScreen mainScreen].bounds.size.width;
    CGFloat screenHeight = [UIScreen mainScreen].bounds.size.height;
    
    UIInterfaceOrientation interfaceOrientation = [[UIApplication sharedApplication] statusBarOrientation];
    if (UIInterfaceOrientationIsLandscape(interfaceOrientation)) {
        CGFloat tmp = screenWidth;
        screenWidth = screenHeight;
        screenHeight = tmp;
    }
   
    return CGSizeMake(screenWidth, screenHeight);

}