same bug revealed with updated imageJ as in lwir16 branch - added explicit...

same bug revealed with updated imageJ as in lwir16 branch - added explicit .convertToColorProcessor() before casting pixels to int[]

src/main/java/com/elphel/imagej/tileprocessor/QuadCLTCPU.java

@@ -13109,7 +13109,7 @@ public class QuadCLTCPU {
 		  if (debugLevel > -1) {
 			  System.out.println("backdropPixels = "+backdropPixels+" h_margin = "+h_margin+" v_margin = "+v_margin);
 		  }
-		  int [] src_pixels = (int []) imp.getProcessor().getPixels();
+		  int [] src_pixels = (int []) imp.getProcessor().convertToColorProcessor().getPixels();
 		  int [] pixels = new int [width2* height2];
 		  int black = noalpha ? 0 :        0xff000000;
 		  int mask =  noalpha ? 0xffffff : 0xffffffff;
@@ -13171,7 +13171,7 @@ public class QuadCLTCPU {
 //		  int v_margin = (int) Math.round((backdropPixels - height)/2);
 //		  int width2 =  width +  2 * h_margin;
 //		  int height2 = height + 2 * v_margin;
-		  int [] src_pixels = (int []) imp.getProcessor().getPixels();
+		  int [] src_pixels = (int []) imp.getProcessor().convertToColorProcessor().getPixels();
 		  int [] pixels = new int [out_width * out_height];
 		  int black = noalpha ? 0 :        0xff000000;
 		  int mask =  noalpha ? 0xffffff : 0xffffffff;