added the inclusion of std::vectors to the .h files

Former-commit-id: d9aa8704172df488773f8d320f0f3ed47d26b394

include/igl/build_octree.h

@@ -8,8 +8,12 @@
 
 #ifndef IGL_BUILD_OCTREE
 #define IGL_BUILD_OCTREE
-#include <Eigen/Core>
 #include "igl_inline.h"
+#include <Eigen/Core>
+#include <vector>
+
+
+
 
 namespace igl
 {

include/igl/fast_winding_number.h

@@ -2,6 +2,7 @@
 #define IGL_FAST_WINDING_NUMBER
 #include "igl_inline.h"
 #include <Eigen/Core>
+#include <vector>
 namespace igl
 {
   // Generate the precomputation for the fast winding number for point data

include/igl/knn_octree.h

@@ -10,6 +10,7 @@
 #define IGL_KNN_OCTREE
 #include "igl_inline.h"
 #include <Eigen/Core>
+#include <vector>
 
 namespace igl
 {