Explicitly initialize c_cc to _POSIX_VDISABLE since we can't know

that we're setting all the values anymore. :(

src/sbbs3/xtrn.cpp

@@ -1582,6 +1582,8 @@ int sbbs_t::external(const char* cmdline, int mode, const char* startup_dir)
 			 * to a value we may have made up.
 			 * TODO: We can set stuff from the user term here...
 			 */
+			for (i = 0; i < (sizeof(term.c_cc) / sizeof(term.c_cc[0])); i++)
+				term.c_cc[i] = _POSIX_VDISABLE;
 #ifdef VEOF
 			term.c_cc[VEOF] = CEOF;
 #endif