isl_range.c: fix typo in comment

diff --git a/isl_range.c b/isl_range.c
index 348be48..70c7d5d 100644 (file)
--- a/isl_range.c
+++ b/isl_range.c
@@ -241,7 +241,7 @@ error:
        return NULL;
 }
 
-/* Helper function to add a guarder polynomial to either pwf_exact or pwf,
+/* Helper function to add a guarded polynomial to either pwf_exact or pwf,
  * depending on whether the result has been determined to be exact.
  */
 static int add_guarded_poly(__isl_take isl_basic_set *bset,