Build with main() rather than CIOLIB_main() if either JSDOCS_BUILD or

WITH_SDL are not defined. This should fix JSDCOS builds for those without
libsdl1.2-dev installed - but really, you want SDL installed to get the
full docs, I think.

src/sbbs3/sbbscon.c

@@ -1355,7 +1355,7 @@ static void show_usage(char *cmd)
 /****************************************************************************/
 /* Main Entry Point															*/
 /****************************************************************************/
-#ifdef BUILD_JSDOCS
+#if defined(BUILD_JSDOCS) && defined(WITH_SDL)
 int CIOLIB_main(int argc, char** argv)
 #else
 int main(int argc, char** argv)