fix bug of reduce

mindspore/lite/src/runtime/kernel/arm/fp32/reduce_fp32.cc

@@ -125,7 +125,7 @@ int ReduceCPUKernel::Run() {
     }
     src_data_ = dst_data_;
   }
-  if (reduce_param_->reduce_to_end_ && abs(reduce_param_->coeff - 1.0f) > 1e-5) {
+  if (reduce_param_->reduce_to_end_ && abs(reduce_param_->coeff) > 1e-5) {
     ret = CalculateCoeffOutput();
     if (ret != RET_OK) {
       FreeTmpBuffer();