*) add ngx_palloc_aligned() to allocate explicitlty aligned memory
*) allows non-aligned memory blocks for small allocations and for odd
   length strings on all platforms
*) use ngx_palloc_aligned()

src/http/ngx_http.c

diff --git a/src/http/ngx_http.c b/src/http/ngx_http.c
index a1c4c98..e8e059c 100644
--- a/src/http/ngx_http.c
+++ b/src/http/ngx_http.c
@@ -1024,12 +1024,15 @@
     lq = (ngx_http_location_queue_t *) q;
     len = lq->name->len - prefix;
 
-    node = ngx_pcalloc(cf->pool,
-                       offsetof(ngx_http_location_tree_node_t, name) + len);
+    node = ngx_palloc_aligned(cf->pool,
+                          offsetof(ngx_http_location_tree_node_t, name) + len);
     if (node == NULL) {
         return NULL;
     }
 
+    node->left = NULL;
+    node->right = NULL;
+    node->tree = NULL;
     node->exact = lq->exact;
     node->inclusive = lq->inclusive;