vs2015: fixes to silo build.

projects/win32/patches/silo-snprintf.patch

+diff --git a/src/silo/silo_win32_compatibility.h b/src/silo/silo_win32_compatibility.h
+index 28bf300..df1d214 100644
+--- a/src/silo/silo_win32_compatibility.h
++++ b/src/silo/silo_win32_compatibility.h
+@@ -12,7 +12,9 @@
+ #define pclose    _pclose
+ #define popen     _popen
+ #define read      _read
+-#define snprintf  _snprintf
++#if _MSC_VER<1900 /* VS2015 onwards, snprintf is supported*/
++# define snprintf  _snprintf
++#endif
+ #define stat      _stat
+ #define write     _write
+ 

projects/win32/silo.cmake

@@ -54,6 +54,8 @@ superbuild_apply_patch(silo no-perl
   "Remove the need for Perl during the build")
 superbuild_apply_patch(silo hdf5-deplibs
   "Link to HDF5 properly")
+superbuild_apply_patch(silo snprintf
+  "Remove snprint redefinition for VS201 and newer")
 
 superbuild_add_extra_cmake_args(
   -DSILO_INCLUDE_DIR:PATH=<INSTALL_DIR>/include