Reapplied Hombres patch (revision c006f93a5f) as it got lost on the way.

rtengine/labimage.cc

@@ -0,0 +1,42 @@
+#include <labimage.h>
+namespace rtengine {
+
+LabImage::LabImage (int w, int h) : fromImage(false), W(w), H(h) {
+
+    L = new unsigned short*[H];
+    for (int i=0; i<H; i++)
+        L[i] = new unsigned short[W];
+
+    a = new short*[H];
+    for (int i=0; i<H; i++)
+        a[i] = new short[W];
+
+    b = new short*[H];
+    for (int i=0; i<H; i++)
+        b[i] = new short[W];
+}
+
+LabImage::LabImage (Image16* im) {
+
+    W = im->width;
+    H = im->height;
+    L = im->r;
+    a = (short**) im->g;
+    b = (short**) im->b;
+    fromImage = true;
+}
+
+LabImage::~LabImage () {
+
+    if (!fromImage) {
+        for (int i=0; i<H; i++) {
+            delete [] L[i];
+            delete [] a[i];
+            delete [] b[i];
+        }
+        delete [] L;
+        delete [] a;
+        delete [] b;
+    }
+}
+}