fix for itnerpolate. test=release/1.4

paddle/fluid/operators/interpolate_op.cc

@@ -40,6 +40,8 @@ class InterpolateOp : public framework::OperatorWithKernel {
     int out_h = ctx->Attrs().Get<int>("out_h");
     int out_w = ctx->Attrs().Get<int>("out_w");
     PADDLE_ENFORCE_EQ(dim_x.size(), 4, "X's dimension must be 4");
+    PADDLE_ENFORCE_GT(out_h, 0, "out_h should be greater than 0.");
+    PADDLE_ENFORCE_GT(out_w, 0, "out_w should be greater than 0.");
 
     if (ctx->HasInput("OutSize") && ctx->IsRuntime()) {
       auto out_size_dim = ctx->GetInputDim("OutSize");
@@ -50,12 +52,8 @@ class InterpolateOp : public framework::OperatorWithKernel {
       return;
     }
 
-    if (ctx->IsRuntime() || (out_h > 0 && out_w > 0)) {
-      std::vector<int64_t> dim_out({dim_x[0], dim_x[1], out_h, out_w});
-      ctx->SetOutputDim("Out", framework::make_ddim(dim_out));
-    } else {
-      ctx->SetOutputDim("Out", dim_x);
-    }
+    std::vector<int64_t> dim_out({dim_x[0], dim_x[1], out_h, out_w});
+    ctx->SetOutputDim("Out", framework::make_ddim(dim_out));
   }
 
  protected: