Correction of a little bug in the Slicer class (OpenMP) + code cleanup

rtengine/slicer.cc

@@ -18,8 +18,11 @@
  */
 
 #include <math.h>
+#ifdef _OPENMP
 #include <omp.h>
+#endif
 #include <slicer.h>
+#include <gtkmm.h>
 
 using namespace rtengine;
 
@@ -67,9 +70,9 @@ Slicer::Slicer(unsigned int imageWidth, unsigned int imageHeight, Block *subRegi
 
 	//total number of core/processor
 #ifdef _OPENMP
-	procNumber = omp_get_num_procs();
+	unsigned int procNumber = omp_get_num_procs();
 #else
-	procNumber = 1;
+	unsigned int procNumber = 1;
 #endif
 
 	//calculate the number of block
@@ -88,9 +91,6 @@ Slicer::Slicer(unsigned int imageWidth, unsigned int imageHeight, Block *subRegi
 
 }
 
-Slicer::~Slicer() {
-}
-
 // return the absolute position and size of the requested block
 void Slicer::get_block(unsigned int numBlock, Block *block) {
 	double roundingTradeOff = (hBlockNumber - (double)((int)hBlockNumber)) == 0.5 ? 2.1 : 2.0;