Merge "posix_spawn_file_actions_addopen(): crash early rather than late." am: 6ef483eb87

Original change: https://android-review.googlesource.com/c/platform/bionic/+/2515747

Change-Id: If5064907ea99bce42f2e73c50c5292cb61945031
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>
diff --git a/libc/bionic/spawn.cpp b/libc/bionic/spawn.cpp
index 7e80ef6..5cf95d8 100644
--- a/libc/bionic/spawn.cpp
+++ b/libc/bionic/spawn.cpp
@@ -340,7 +340,7 @@
   if (action == nullptr) return errno;
 
   action->next = nullptr;
-  if (path != nullptr) {
+  if (what == kOpen) {
     action->path = strdup(path);
     if (action->path == nullptr) {
       free(action);