Compile fixes if OpenMP is not available

Contractor/Contractor.h

@@ -35,7 +35,9 @@ or see http://www.gnu.org/licenses/agpl.txt.
 #include <set>
 #include <stack>
 #include <limits>
+#ifdef _OPEMP
 #include <omp.h>
+#endif
 
 class Contractor {
 

DataStructures/NNGrid.h

@@ -28,7 +28,9 @@ or see http://www.gnu.org/licenses/agpl.txt.
 #include <limits>
 #include <vector>
 #include <stxxl.h>
+#ifdef _OPENMP
 #include <omp.h>
+#endif
 
 #ifdef _WIN32
 #include <math.h>

createHierarchy.cpp

@@ -38,6 +38,11 @@ or see http://www.gnu.org/licenses/agpl.txt.
 
 #ifdef _OPENMP
 #include <omp.h>
+#else
+int omp_get_num_procs() { return 1; }
+int omp_get_max_threads() { return 1; }
+int omp_get_thread_num() { return 0; }
+int omp_set_num_threads(int i) {}
 #endif
 
 #include "typedefs.h"

routed.cpp

@@ -23,6 +23,10 @@ or see http://www.gnu.org/licenses/agpl.txt.
 
 #ifdef _OPENMP
 #include <omp.h>
+#else 
+int omp_get_num_procs() { return 1; }
+int omp_get_max_threads() { return 1; }
+int omp_get_thread_num() { return 0; }
 #endif
 
 #include <boost/thread.hpp>