Fix STM32 for non DMA

SdFat/src/SdFat.h

 #endif  // ARDUINO
 //------------------------------------------------------------------------------
 /** SdFat version YYYYMMDD */
-#define SD_FAT_VERSION 20160422
+#define SD_FAT_VERSION 20160427
 //==============================================================================
 /**
  * \class SdBaseFile

SdFat/src/SdSpiCard/SdSpiSTM32F1.cpp

 #if USE_STM32F1_DMAC
   rtn = SPI.dmaTransfer(0, const_cast<uint8*>(buf), n);
 #else  // USE_STM32F1_DMAC
-  SPI.read(buf, n);
+//  SPI.read(buf, n);
+  for (size_t i = 0; i < n; i++) {
+    buf[i] = SPI.transfer(0XFF);
+  }
 #endif  // USE_STM32F1_DMAC
   return rtn;
 }