ext/bcmath: make ref_str const

MaxKellermann · MaxKellermann · commit aa19fbfd69c4 · 2023-02-17T12:58:12.000+01:00
diff --git a/ext/bcmath/libbcmath/src/output.c b/ext/bcmath/libbcmath/src/output.c
@@ -48,7 +48,7 @@ typedef struct stk_rec {
 } stk_rec;
 
 /* The reference string for digits. */
-static char ref_str[] = "0123456789ABCDEF";
+static const char ref_str[] = "0123456789ABCDEF";
 
 
 /* A special output routine for "multi-character digits."  Exactly
