Use realloc in strbuffer_append_bytes

src/jansson-2.6/src/strbuffer.c

@@ -86,13 +86,10 @@ int strbuffer_append_bytes(strbuffer_t *strbuff, const char *data, size_t size)
         new_size = max(strbuff->size * STRBUFFER_FACTOR,
                        strbuff->length + size + 1);
 
-        new_value = jsonp_malloc(new_size);
+        new_value = realloc(strbuff->value, new_size);
         if(!new_value)
             return -1;
 
-        memcpy(new_value, strbuff->value, strbuff->length);
-
-        jsonp_free(strbuff->value);
         strbuff->value = new_value;
         strbuff->size = new_size;
     }