fix #173, Fix compilation error

Classes/WDAnglePicker.m

@@ -21,6 +21,8 @@ @implementation WDAnglePicker
 
 - (void) awakeFromNib
 {
+    [super awakeFromNib];
+
     self.exclusiveTouch = YES;
 
     self.layer.shadowOpacity = 0.15f;

Classes/WDColorSlider.m

@@ -99,6 +99,8 @@ @implementation WDColorSlider
 
 - (void) awakeFromNib
 {
+    [super awakeFromNib];
+
     indicator_ = [WDColorIndicator colorIndicator];
     indicator_.sharpCenter = WDCenterOfRect([self bounds]);
     [self addSubview:indicator_];

Classes/WDEventForwardingView.m

@@ -18,6 +18,8 @@ @implementation WDEventForwardingView
 
 - (void) awakeFromNib
 {
+    [super awakeFromNib];
+
     self.opaque = NO;
     self.backgroundColor = nil;
 }

Classes/WDGradientEditor.m

@@ -29,6 +29,8 @@ @implementation WDGradientEditor
 
 - (void) awakeFromNib
 {
+    [super awakeFromNib];
+
     indicators_ = [[NSMutableArray alloc] init];
     self.gradient = [WDGradient defaultGradient];
 

Classes/WDLayerCell.m

@@ -27,6 +27,8 @@ @implementation WDLayerCell
 
 - (void) awakeFromNib
 {
+    [super awakeFromNib];
+
     [visibleButton addTarget:self action:@selector(toggleVisibility:) forControlEvents:UIControlEventTouchUpInside];
     [lockButton addTarget:self action:@selector(toggleLocked:) forControlEvents:UIControlEventTouchUpInside];
 

Classes/WDLineAttributePicker.m

@@ -209,6 +209,8 @@ - (void) setMode:(WDStrokeAttributes)mode
 
 - (void) awakeFromNib
 {
+    [super awakeFromNib];
+
     self.backgroundColor = nil;
     self.opaque = NO;
 }

Classes/WDSparkSlider.m

@@ -28,6 +28,8 @@ @implementation WDSparkSlider
 
 - (void) awakeFromNib
 {
+    [super awakeFromNib];
+
     self.opaque = NO;
     self.backgroundColor = nil;