Added a tiny sleep on assets to stop pegging the CPU

src/dusk/asset/asset.c

@@ -89,6 +89,7 @@ errorret_t assetRequireLoaded(assetentry_t *entry) {
 
   // Not loaded, just spin the wheel
   while(entry->state != ASSET_ENTRY_STATE_LOADED) {
+    usleep(1000);
     errorChain(assetUpdate());
   }
 
@@ -268,6 +269,9 @@ void assetUpdateAsync(thread_t *thread) {
           continue;
       }
     } while(loading < ASSET.loading + ASSET_LOADING_COUNT_MAX);
+
+    if(threadShouldStop(thread)) break;
+    usleep(1000);
   }
 }