Add missing headers in order to import definitions.

Author: Johannes Markert

src/t8_geometry/t8_geometry_implementations/t8_geometry_analytic.h

@@ -27,6 +27,9 @@
 #ifndef T8_GEOMETRY_ANALYTIC_H
 #define T8_GEOMETRY_ANALYTIC_H
 
+#include <t8.h>
+#include <t8_cmesh.h>
+
 /**
  * Definition of an analytic geometry function.
  * This function maps reference coordinates to physical

src/t8_geometry/t8_geometry_with_vertices.h

@@ -28,6 +28,7 @@
 #ifndef T8_GEOMETRY_WITH_VERTICES_H
 #define T8_GEOMETRY_WITH_VERTICES_H
 
+#include <t8.h>
 #include <t8_cmesh.h>
 
 T8_EXTERN_C_BEGIN ();