opencl: Remove unneeded and potentially bad type casts

Signed-off-by: Stefan Weil <[email protected]>

Author: stweil

ccmain/thresholder.cpp

@@ -265,7 +265,7 @@ void ImageThresholder::OtsuThresholdRectToPix(Pix* src_pix,
   OpenclDevice od;
   if ((num_channels == 4 || num_channels == 1) &&
       od.selectedDeviceIsOpenCL() && rect_top_ == 0 && rect_left_ == 0 ) {
-    od.ThresholdRectToPixOCL((const unsigned char*)pixGetData(src_pix),
+    od.ThresholdRectToPixOCL((unsigned char*)pixGetData(src_pix),
                              num_channels, pixGetWpl(src_pix) * 4,
                              thresholds, hi_values, out_pix /*pix_OCL*/,
                              rect_height_, rect_width_, rect_top_, rect_left_);

ccstruct/otsuthr.cpp

@@ -58,7 +58,7 @@ int OtsuThreshold(Pix* src_pix, int left, int top, int width, int height,
   OpenclDevice od;
   if (od.selectedDeviceIsOpenCL() && (num_channels == 1 || num_channels == 4) &&
       top == 0 && left == 0) {
-    od.HistogramRectOCL((const unsigned char*)pixGetData(src_pix), num_channels,
+    od.HistogramRectOCL((unsigned char*)pixGetData(src_pix), num_channels,
                         pixGetWpl(src_pix) * 4, left, top, width, height,
                         kHistogramSize, histogramAllChannels);