fix blur size property removed from gpuimage.

gpuimage has removed blurSize property, I just change it to the new one
in order to work with the last stable gpuimage release, 0.1.2. See the
issue reported here:
dmitric#45.

Classes/DLCImagePickerController.m

@@ -353,7 +353,7 @@ -(IBAction) toggleBlur:(UIButton*)blurButton {
             blurFilter = [[GPUImageGaussianSelectiveBlurFilter alloc] init];
             [(GPUImageGaussianSelectiveBlurFilter*)blurFilter setExcludeCircleRadius:80.0/320.0];
             [(GPUImageGaussianSelectiveBlurFilter*)blurFilter setExcludeCirclePoint:CGPointMake(0.5f, 0.5f)];
-            [(GPUImageGaussianSelectiveBlurFilter*)blurFilter setBlurSize:kStaticBlurSize];
+            [(GPUImageGaussianSelectiveBlurFilter*)blurFilter setBlurRadiusInPixels:kStaticBlurSize];
             [(GPUImageGaussianSelectiveBlurFilter*)blurFilter setAspectRatio:1.0f];
         }
         hasBlur = YES;
@@ -518,20 +518,20 @@ -(IBAction) handlePan:(UIGestureRecognizer *) sender {
 
         if ([sender state] == UIGestureRecognizerStateBegan) {
             [self showBlurOverlay:YES];
-            [gpu setBlurSize:0.0f];
+            [gpu setBlurRadiusInPixels:0.0f];
             if (isStatic) {
                 [staticPicture processImage];
             }
         }
 
         if ([sender state] == UIGestureRecognizerStateBegan || [sender state] == UIGestureRecognizerStateChanged) {
-            [gpu setBlurSize:0.0f];
+            [gpu setBlurRadiusInPixels:0.0f];
             [self.blurOverlayView setCircleCenter:tapPoint];
             [gpu setExcludeCirclePoint:CGPointMake(tapPoint.x/320.0f, tapPoint.y/320.0f)];
         }
 
         if([sender state] == UIGestureRecognizerStateEnded){
-            [gpu setBlurSize:kStaticBlurSize];
+            [gpu setBlurRadiusInPixels:kStaticBlurSize];
             [self showBlurOverlay:NO];
             if (isStatic) {
                 [staticPicture processImage];
@@ -585,14 +585,14 @@ -(IBAction) handlePinch:(UIPinchGestureRecognizer *) sender {
 
         if ([sender state] == UIGestureRecognizerStateBegan) {
             [self showBlurOverlay:YES];
-            [gpu setBlurSize:0.0f];
+            [gpu setBlurRadiusInPixels:0.0f];
             if (isStatic) {
                 [staticPicture processImage];
             }
         }
 
         if ([sender state] == UIGestureRecognizerStateBegan || [sender state] == UIGestureRecognizerStateChanged) {
-            [gpu setBlurSize:0.0f];
+            [gpu setBlurRadiusInPixels:0.0f];
             [gpu setExcludeCirclePoint:CGPointMake(midpoint.x/320.0f, midpoint.y/320.0f)];
             self.blurOverlayView.circleCenter = CGPointMake(midpoint.x, midpoint.y);
             CGFloat radius = MAX(MIN(sender.scale*[gpu excludeCircleRadius], 0.6f), 0.15f);
@@ -602,7 +602,7 @@ -(IBAction) handlePinch:(UIPinchGestureRecognizer *) sender {
         }
 
         if ([sender state] == UIGestureRecognizerStateEnded) {
-            [gpu setBlurSize:kStaticBlurSize];
+            [gpu setBlurRadiusInPixels:kStaticBlurSize];
             [self showBlurOverlay:NO];
             if (isStatic) {
                 [staticPicture processImage];