loader: gh571 vkEnumerateInstanceLayerProperties()

This fixed a memory leak.

Steps to reproduce:
Run valgrind --leak_check=full on a this test file:
```

int main() {
  uint32_t layerCount = 0;
  vkEnumerateInstanceLayerProperties(&layerCount, nullptr);
  printf("layerCount=%u\n", layerCount);
  return 0;
}
```

valgrind output will look like:
```
==PID==
==PID== 49,920 bytes in 6 blocks are definitely lost in loss record 57 of 58
==PID==    at 0x40307C4: malloc (vg_replace_malloc.c:270)
==PID==    by 0x4A2B5F3: loader_instance_heap_alloc (loader/loader.c:178)
==PID==    by 0x4A2CB0D: loader_init_generic_list (loader/loader.c:858)
==PID==    by 0x4A2CBDE: loader_add_to_ext_list (loader/loader.c:889)
==PID==    by 0x4A30A32: loader_read_json_layer (loader/loader.c:2311)
==PID==    by 0x4A31373: loader_add_layer_properties (loader/loader.c:2509)
==PID==    by 0x4A3286F: loader_layer_scan (loader/loader.c:3032)
==PID==    by 0x4A38DFC: vkEnumerateInstanceLayerProperties (loader/trampoline.c:239)
==PID==
```

The fix is simple: vkEnumerateInstanceLayerProperties() in loader/trampoline.c should call loader_delete_layer_properties(), not loader_destroy_layer_list() in both places it frees resources associated with the instance_layer_list.

Change-Id: I3275195dd27703c2747971288327d546efe5ed25

1 files changed, 2 insertions, 2 deletions

diff --git a/loader/trampoline.c b/loader/trampoline.c
index 03c1c793..5d5d486e 100644
--- a/loader/trampoline.c
+++ b/loader/trampoline.c
@@ -156,7 +156,7 @@ vkEnumerateInstanceExtensionProperties(const char *pLayerName,
                 loader_add_to_ext_list(NULL, &local_ext_list, ext_list->count,
                                        ext_list->list);
             }
-            loader_destroy_layer_list(NULL, NULL, &local_list);
+            loader_delete_layer_properties(NULL, &local_list);
             global_ext_list = &local_ext_list;
 
         } else {
@@ -219,7 +219,7 @@ vkEnumerateInstanceExtensionProperties(const char *pLayerName,
 
 out:
     loader_destroy_generic_list(NULL, (struct loader_generic_list *)&local_ext_list);
-    loader_destroy_layer_list(NULL, NULL, &instance_layers);
+    loader_delete_layer_properties(NULL, &instance_layers);
     return res;
 }