[FcStrBuf] better handle malloc failure

If buffer has failed allocation, return NULL when done.

diff --git a/src/fcstr.c b/src/fcstr.c
index 2f2cd4dfd0dc6b2c6857d4bd0497006e7a76b250..3b84ac0d179dad85ad8d89aeaf0eaf4dce68d351 100644 (file)
--- a/src/fcstr.c
+++ b/src/fcstr.c
@@ -733,7 +733,10 @@ FcStrBufDone (FcStrBuf *buf)
 {
     FcChar8 *ret;
 
-    ret = malloc (buf->len + 1);
+    if (buf->failed)
+       ret = NULL;
+    else
+       ret = malloc (buf->len + 1);
     if (ret)
     {
        FcMemAlloc (FC_MEM_STRING, buf->len + 1);
@@ -752,6 +755,9 @@ FcStrBufChar (FcStrBuf *buf, FcChar8 c)
        FcChar8     *new;
        int         size;
 
+       if (buf->failed)
+           return FcFalse;
+
        if (buf->allocated)
        {
            size = buf->size * 2;