Revert "py/gc: Zero out all newly allocated memory to prevent stale pointers."

This reverts commit 1c0343f9d991c241d335712593f3a63858dc91b6.

Reason: to make merging simpler.  This feature will anyway be provided by
master in a later version.

1 files changed, 4 insertions, 1 deletions

diff --git a/py/malloc.c b/py/malloc.c
index c837ed5735..b0493d9341 100644
--- a/py/malloc.c
+++ b/py/malloc.c
@@ -114,7 +114,10 @@ void *m_malloc_with_finaliser(size_t num_bytes) {
 
 void *m_malloc0(size_t num_bytes) {
     void *ptr = m_malloc(num_bytes);
-    // memory is already cleared by gc_alloc
+    if (ptr == NULL && num_bytes != 0) {
+        return m_malloc_fail(num_bytes);
+    }
+    memset(ptr, 0, num_bytes);
     return ptr;
 }