basic/strv: allow NULLs to be inserted into strv

All callers of this function insert non-empty strings, so there's no functional
change.

diff --git a/src/basic/strv.c b/src/basic/strv.c
index 0eec868eed1f5e0dc46288eadf16b89830d49b7c..60f92e63733c3ae040fa350e2080ecb227188783 100644 (file)
--- a/src/basic/strv.c
+++ b/src/basic/strv.c
@@ -564,9 +564,6 @@ int strv_extend_front(char ***l, const char *value) {
 
         /* Like strv_extend(), but prepends rather than appends the new entry */
 
-        if (!value)
-                return 0;
-
         n = strv_length(*l);
 
         /* Increase and overflow check. */
@@ -574,9 +571,12 @@ int strv_extend_front(char ***l, const char *value) {
         if (m < n)
                 return -ENOMEM;
 
-        v = strdup(value);
-        if (!v)
-                return -ENOMEM;
+        if (value) {
+                v = strdup(value);
+                if (!v)
+                        return -ENOMEM;
+        } else
+                v = NULL;
 
         c = realloc_multiply(*l, sizeof(char*), m);
         if (!c) {