Fix compile errors

[maxsz]

The compiler fails to understand the typeof (self) syntax:

FPPopover/FPPopoverController.m:124:17: warning: type specifier missing, defaults to 'int' [-Wimplicit-int] __block typeof (self) bself = self; ~~~~~~~ ^ FPPopover/FPPopoverController.m:124:25: error: a parameter list without types is only allowed in a function definition __block typeof (self) bself = self; ^ FPPopover/FPPopoverController.m:124:30: error: expected ';' at end of declaration __block typeof (self) bself = self;

I fixed this by following the advice found at http://stackoverflow.com/a/10921206/1147607