Fix Xcode 15.1 build warning (#12027)

firebase · Oct 31, 2023 · a64205b · a64205b
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diff --git a/FirebasePerformance/CHANGELOG.md b/FirebasePerformance/CHANGELOG.md
@@ -1,3 +1,6 @@
+# 10.18.0
+- [fixed] Fix a Xcode 15.1 build warning (#12027).
+
 # 10.17.0
 - [fixed] Fix a second Xcode 15 runtime warning (#11821).
 

diff --git a/FirebasePerformance/Sources/Gauges/CPU/FPRCPUGaugeCollector.m b/FirebasePerformance/Sources/Gauges/CPU/FPRCPUGaugeCollector.m
@@ -45,7 +45,7 @@ @interface FPRCPUGaugeCollector ()
  *
  * @return Instance of FPRCPUGaugeData.
  */
-FPRCPUGaugeData *fprCollectCPUMetric() {
+FPRCPUGaugeData *fprCollectCPUMetric(void) {
   kern_return_t kernelReturnValue;
   mach_msg_type_number_t task_info_count;
   task_info_data_t taskInfo;