ms-sbvar: support ctrl-c changes in submodule, #304

(cherry picked from commit a8d07308)

mex/build/matlab/ms_sbvar/Makefile.am

 include ../mex.am
 include ../../ms_sbvar.am
+
+ms_sbvar_create_init_file_LDADD = -lut
+ms_sbvar_command_line_LDADD = -lut

mex/sources/ms-sbvar/modify_for_mex.h

@@ -32,6 +32,14 @@
 #define dw_free mxFree
 #define dw_exit msExit
 
+/* Handle Ctrl-C in Matlab/Octave */
+#ifdef MATLAB_MEX_FILE
+extern bool utIsInterruptPending();
+#else
+#include <octave/config.h>
+#include <octave/quit.h>
+#endif
+
 void msExit(int status);
 extern int constant_seed;