fix neon depthwise conv bug

paddle/function/neon/NeonDepthwiseConv.cpp

@@ -66,8 +66,7 @@ class NeonDepthwiseConvFunction : public ConvFunctionBase {
     float* inputPadding = inputData;
     int padInputHeight = inputHeight + 2 * paddingH();
     int padInputWidth = inputWidth + 2 * paddingW();
-    if (paddingH() > 0 || paddingW() > 0) {
-      int newSize = batchSize * inputChannels * padInputHeight * padInputWidth;
+    int newSize = batchSize * (inputChannels + 1) * padInputHeight * padInputWidth;
     resizeBuffer<Device>(newSize);
     inputPadding = reinterpret_cast<float*>(memory_->getBuf());
     neon::Padding<float>::run(inputData,
@@ -77,7 +76,6 @@ class NeonDepthwiseConvFunction : public ConvFunctionBase {
                                 inputWidth,
                                 padInputHeight,
                                 padInputWidth);
-    }
 
     std::function<void(
         const float*, const float*, int, int, int, int, int, int, float*)>