Add void's to eliminate Xcode 9.1 warnings (#352)

1 files changed, 5 insertions, 5 deletions

diff --git a/Firebase/Messaging/FIRMessagingUtilities.m b/Firebase/Messaging/FIRMessagingUtilities.m
index 13c7a05..60f3f28 100644
--- a/Firebase/Messaging/FIRMessagingUtilities.m
+++ b/Firebase/Messaging/FIRMessagingUtilities.m
@@ -127,17 +127,17 @@ void FIRMessagingSetLastStreamId(GPBMessage *proto, int sid) {
 
 #pragma mark - Time
 
-int64_t FIRMessagingCurrentTimestampInSeconds() {
+int64_t FIRMessagingCurrentTimestampInSeconds(void) {
   return (int64_t)[[NSDate date] timeIntervalSince1970];
 }
 
-int64_t FIRMessagingCurrentTimestampInMilliseconds() {
+int64_t FIRMessagingCurrentTimestampInMilliseconds(void) {
   return (int64_t)(FIRMessagingCurrentTimestampInSeconds() * 1000.0);
 }
 
 #pragma mark - App Info
 
-NSString *FIRMessagingCurrentAppVersion() {
+NSString *FIRMessagingCurrentAppVersion(void) {
   NSString *version = [[NSBundle mainBundle] infoDictionary][@"CFBundleShortVersionString"];
   if (![version length]) {
     FIRMessagingLoggerError(kFIRMessagingMessageCodeUtilities000,
@@ -147,11 +147,11 @@ NSString *FIRMessagingCurrentAppVersion() {
   return version;
 }
 
-NSString *FIRMessagingAppIdentifier() {
+NSString *FIRMessagingAppIdentifier(void) {
   return [[NSBundle mainBundle] bundleIdentifier];
 }
 
-uint64_t FIRMessagingGetFreeDiskSpaceInMB() {
+uint64_t FIRMessagingGetFreeDiskSpaceInMB(void) {
   NSError *error;
   NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);