F1: update STM32ADC.h to fix #801

Author: stevstrong

STM32F1/libraries/STM32ADC/src/STM32ADC.h

@@ -34,6 +34,11 @@ class STM32ADC{
 */
 	void setDMA(uint16 * Buf, uint32 dmaFlags, voidFuncPtr func);
 	void startDMA(uint16 BufLen);
+
+	void setDMA(uint16 * Buf, uint16 BufLen, uint32 dmaFlags, voidFuncPtr func) {
+		setDMA(Buf, dmaFlags, func);
+		startDMA(BufLen);
+	}
 
 /*
     This function is used to setup DMA with the ADC.