A couple more changes for dealing with "checker" warnings.

clientserver.c

@@ -214,7 +214,7 @@ int start_inband_exchange(int f_in, int f_out, const char *user, int argc, char
 	int sargc = 0;
 	char *p, *modname;
 
-	assert(argc > 0);
+	assert(argc > 0 && *argv != NULL);
 
 	if (**argv == '/') {
 		rprintf(FERROR,

configure.in

@@ -970,7 +970,7 @@ if test x"$enable_acl_support" = x"no" -o x"$enable_xattr_support" = x"no" -o x"
 fi
 
 case "$CC" in
-checker*)
+' checker'*|checker*)
     AC_DEFINE(FORCE_FD_ZERO_MEMSET, 1, [Used to make "checker" understand that FD_ZERO() clears memory.])
     ;;
 esac