Fix warnings exposed by Xcode 9.1 in RTDB (#353)

2 files changed, 4 insertions, 4 deletions

diff --git a/Firebase/Database/Core/Utilities/FIRRetryHelper.h b/Firebase/Database/Core/Utilities/FIRRetryHelper.h
index ffe2726..f83aad9 100644
--- a/Firebase/Database/Core/Utilities/FIRRetryHelper.h
+++ b/Firebase/Database/Core/Utilities/FIRRetryHelper.h
@@ -24,7 +24,7 @@
                          retryExponent:(double)retryExponent
                           jitterFactor:(double)jitterFactor;
 
-- (void) retry:(void (^)())block;
+- (void) retry:(void (^)(void))block;
 
 - (void) cancel;
 
diff --git a/Firebase/Database/Core/Utilities/FIRRetryHelper.m b/Firebase/Database/Core/Utilities/FIRRetryHelper.m
index 6d79159..bcd9060 100644
--- a/Firebase/Database/Core/Utilities/FIRRetryHelper.m
+++ b/Firebase/Database/Core/Utilities/FIRRetryHelper.m
@@ -20,13 +20,13 @@
 
 @interface FIRRetryHelperTask : NSObject
 
-@property (nonatomic, strong) void (^block)();
+@property (nonatomic, strong) void (^block)(void);
 
 @end
 
 @implementation FIRRetryHelperTask
 
-- (instancetype) initWithBlock:(void (^)())block {
+- (instancetype) initWithBlock:(void (^)(void))block {
     self = [super init];
     if (self != nil) {
         self->_block = [block copy];
@@ -86,7 +86,7 @@
     return self;
 }
 
-- (void) retry:(void (^)())block {
+- (void) retry:(void (^)(void))block {
     if (self.scheduledRetry != nil) {
         FFLog(@"I-RDB054001", @"Canceling existing retry attempt");
         [self.scheduledRetry cancel];