fix: sanitizer checks fix (iteration 1)

src/compiler/fzl_token.c

@@ -6,15 +6,20 @@
 fzl_token_t *fzl_mktoken(const fzl_toktype_t type, size_t line, size_t col,
                          void *value, size_t value_len, char *filename)
 {
-  char *valholder = malloc(value_len + 1);
-  memcpy(valholder, value, value_len);
-  valholder[value_len] = '\0';
+  char *valholder = NULL;
+
+  if (value && value_len > 0)
+  {
+    valholder = malloc(value_len + 1);
+    memcpy(valholder, value, value_len);
+    valholder[value_len] = '\0';
+  }
 
   fzl_token_t *token = malloc(sizeof(fzl_token_t));
   token->type        = type;
   token->ln          = line;
   token->cn          = col;
-  token->store_value = value_len > 0;
+  token->store_value = (valholder != NULL);
   token->value       = valholder;
   token->value_sz    = value_len;
   token->filename    = filename;