fix tb56 build

Change-Id: I453d6e1840445a03c6918173dc93f32e3028ea74
error: no matching function for call to 'max(int, sal_Int32&)'

vcl/source/bitmap/BitmapFilterStackBlur.cxx

@@ -436,7 +436,7 @@ void stackBlurVertical(
 void stackBlur24(Bitmap& rBitmap, sal_Int32 nRadius, sal_Int32 nComponentWidth)
 {
     // Limit radius
-    nRadius = std::min(254, std::max(2, nRadius));
+    nRadius = std::min(254, std::max<sal_Int32>(2, nRadius));
     const long nColorChannels = 3; // 3 color channel
     BlurSharedData aData(nRadius, nComponentWidth, nColorChannels);