Fix return values in some signals/methods

sources/BaseAPI/API/Unflect/UnflectApi.uc

@@ -58,7 +58,7 @@ protected function Finalizer() {
     functionCaster = none;
 }
 
-public final function bool _drop() {
+public final function _drop() {
     local UFunction nextFunctionInstance;
     local Text nextFunctionName;
     local HashTableIterator iter;

sources/Chat/ChatAPI.uc

@@ -210,7 +210,7 @@ public /*signal*/ function ChatAPI_OnMessageFor_Slot OnMessageFor(AcediaObject r
 ///
 /// # Slot description
 ///
-/// bool <slot>(EPlayer sender, ChatApi.BuiltInVoiceMessage message)
+/// void <slot>(EPlayer sender, ChatApi.BuiltInVoiceMessage message)
 ///
 /// ## Parameters
 ///