regex: allow undefined isblank

diff --git a/usual/regex.c b/usual/regex.c
index 63e09149f7c0715c48f0efbc38f00f3729763fc4..4c7d656208a2a761e8ee498a7482c5179192e19c 100644 (file)
--- a/usual/regex.c
+++ b/usual/regex.c
@@ -63,6 +63,7 @@
 #define is_word(c) (isalnum(c) || (c) == '_')
 
 #ifndef isblank
+#define isblank usual_isblank
 static int isblank(int c) { return ((c) == ' ' || (c) == '\t'); }
 #endif