Fix issue 19 and lib ver roll.

Author: nseidle

library.properties

@@ -1,5 +1,5 @@
 name=SparkFun Micro OLED Breakout
-version=1.2.0
+version=1.2.1
 author=SparkFun Electronics <techsupport@sparkfun.com>
 maintainer=SparkFun Electronics <sparkfun.com>
 sentence=Library for the <a href="https://www.sparkfun.com/products/13003">SparkFun Micro OLED Breakout</a>.

src/SFE_MicroOLED.cpp

@@ -205,12 +205,14 @@ void MicroOLED::begin()
 	setDrawMode(NORM);
 	setCursor(0,0);
 
-	pinMode(dcPin, OUTPUT);
 	pinMode(rstPin, OUTPUT);
 
 	// Set up the selected interface:
 	if (interface == MODE_SPI)
+	{
+		pinMode(dcPin, OUTPUT);
 		spiSetup();
+	}
 	else if (interface == MODE_I2C)
 		i2cSetup();
 	else if (interface == MODE_PARALLEL)