fix windows build of grass fake library

Author: jef-n

src/providers/grass/CMakeLists.txt

@@ -438,6 +438,7 @@ SET ( PROTOTYPES "// Auto generated by cmake, do not edit\n" )
 LIST ( APPEND PROTOTYPES "#define GRASS_GISDEFS_H\n" )
 LIST ( APPEND PROTOTYPES "extern \"C\"\n" )
 LIST ( APPEND PROTOTYPES "{\n" )
+LIST ( APPEND PROTOTYPES "#include <sys/types.h>\n" )
 LIST ( APPEND PROTOTYPES "#include <grass/gis.h>\n" )
 #LIST ( APPEND PROTOTYPES "int GRASS_LIB_EXPORT G_set_error_routine(int (*)(const char *, int))\;\n" )