added maxlog=1 to get_num_threads warning for AppleAccelerate

Author: ajinkya-k

src/lbt.jl

@@ -222,7 +222,7 @@ end
 
 function lbt_get_num_threads()
     if (basename(first(lbt_get_config().loaded_libs).libname) === "Accelerate")
-        @warn "Apple Accelerate does not report number of threads, returning 1 instead"
+        @warn "Apple Accelerate does not report number of threads, returning 1 instead" maxlog=1
     end
     return ccall((:lbt_get_num_threads, libblastrampoline), Int32, ())
 end