modprobe: fix a segfault when modprobe is called with no arguments at all

function                                             old     new   delta
modprobe_main                                        559     535     -24

modutils/modutils.c

@@ -106,7 +106,7 @@ char * FAST_FUNC parse_cmdline_module_options(char **argv)
 	while (*++argv) {
 		options = xrealloc(options, optlen + 2 + strlen(*argv) + 2);
 		/* Spaces handled by "" pairs, but no way of escaping quotes */
-		optlen += sprintf(options + optlen, (strchr(*argv,' ') ? "\"%s\" " : "%s "), *argv);
+		optlen += sprintf(options + optlen, (strchr(*argv, ' ') ? "\"%s\" " : "%s "), *argv);
 	}
 	return options;
 }