fix incorrect loop-again logic on async threads

src/base/base_entry_point.c

@@ -193,11 +193,11 @@ async_thread_entry_point(void *params)
     if(!ins_atomic_u32_eval(&async_loop_again))
     {
       MutexScope(async_tick_start_mutex) cond_var_wait(async_tick_start_cond_var, async_tick_start_mutex, os_now_microseconds()+100000);
-      if(lane_idx() == 0)
+    }
+    else if(lane_idx() == 0)
     {
       async_loop_again = 0;
     }
-    }
 #if defined(CONTENT_H)
     c_tick();
 #endif

src/texture_cache/texture_cache.c

@@ -97,6 +97,7 @@ tex_texture_from_hash_topology(Access *access, U128 hash, TEX_Topology topology)
             n->v.top  = topology;
             tex_shared->req_count += 1;
           }
+          cond_var_broadcast(async_tick_start_cond_var);
         }
         
         // rjf: node? -> grab & access