replace ugly block notation with clean typedef

Classes/BITCrashManager.h

@@ -39,6 +39,11 @@
 #import <CrashReporter/CrashReporter.h>
 #endif
 
+/**
+ * Custom block that handles the alert that prompts the user whether he wants to send crash reports
+ */
+typedef void(^customAlertViewHandler)();
+
 
 /**
  * Crash Manager status

Classes/BITCrashManager.m

@@ -446,7 +446,7 @@ NSString *const kBITCrashManagerStatus = @"BITCrashManagerStatus";
 }
 
 
-- (void)setAlertViewHandler:(void (^)())alertViewHandler{
+- (void)setAlertViewHandler:(customAlertViewHandler)alertViewHandler{
   _alertViewHandler = alertViewHandler;
 }