message: vertexfilter: Fix decodeFilterExp for ARM
  ARM uses unsigned chars, so our exponent decoding was incorrect; instead
  of using widening with sign extension we can simply shift the 32-bit
  value.
diff: @@ -105,7 +105,7 @@ static void decodeFilterExp(unsigned int* data, size_t count)
  // decode mantissa and exponent
  int m = int(v << 8) >> 8;
  - int e = char(v >> 24);
  + int e = int(v) >> 24;
  union {
  float f;
  