dg : get rid of all swig warnings

wrappers/gmshpy/gmshNumeric.i

@@ -19,6 +19,8 @@
   #include "pyramidalBasis.h"
 %}
 
+%rename("_assign=") operator();
+%rename("_assign_operator=") operator=;
 %include "GaussIntegration.h"
 %include "JacobianBasis.h"
 %include "fullMatrix.h"

wrappers/gmshpy/gmshtypemaps.i

@@ -6,6 +6,7 @@
 }
 
 %fragment("fullMatrixConversion", "header", fragment="fullMatrixConversionInit") {
+  %#undef HAVE_DLOPEN
   %#include "fullMatrix.h"
   %#include "GmshConfig.h"
   %#ifdef HAVE_NUMPY