Fix an incorrect return type.

Public issue https://github.com/mackron/miniaudio/issues/396

miniaudio.h

@@ -10814,7 +10814,7 @@ MA_API ma_device* ma_engine_get_device(ma_engine* pEngine);
 MA_API ma_log* ma_engine_get_log(ma_engine* pEngine);
 MA_API ma_node* ma_engine_get_endpoint(ma_engine* pEngine);
 MA_API ma_uint64 ma_engine_get_time(const ma_engine* pEngine);
-MA_API ma_uint64 ma_engine_set_time(ma_engine* pEngine, ma_uint64 globalTime);
+MA_API ma_result ma_engine_set_time(ma_engine* pEngine, ma_uint64 globalTime);
 MA_API ma_uint32 ma_engine_get_channels(const ma_engine* pEngine);
 MA_API ma_uint32 ma_engine_get_sample_rate(const ma_engine* pEngine);
 
@@ -71849,7 +71849,7 @@ MA_API ma_uint64 ma_engine_get_time(const ma_engine* pEngine)
     return ma_node_graph_get_time(&pEngine->nodeGraph);
 }
 
-MA_API ma_uint64 ma_engine_set_time(ma_engine* pEngine, ma_uint64 globalTime)
+MA_API ma_result ma_engine_set_time(ma_engine* pEngine, ma_uint64 globalTime)
 {
     return ma_node_graph_set_time(&pEngine->nodeGraph, globalTime);
 }