nginx-0.1.25-RELEASE import

    *) Bugfix: nginx did run on Linux parisc.

    *) Feature: nginx now does not start under FreeBSD if the sysctl
       kern.ipc.somaxconn value is too big.

    *) Bugfix: if a request was internally redirected by the
       ngx_http_index_module module to the ngx_http_proxy_module or
       ngx_http_fastcgi_module modules, then the index file was not closed
       after request completion.

    *) Feature: the "proxy_pass" can be used in location with regular
       expression.

    *) Feature: the ngx_http_rewrite_filter_module module supports the
       condition like "if ($HTTP_USER_AGENT ~ MSIE)".

    *) Bugfix: nginx started too slow if the large number of addresses and
       text values were used in the "geo" directive.

    *) Change: a variable name must be declared as "$name" in the "geo"
       directive. The previous variant without "$" is still supported, but
       will be removed soon.

    *) Feature: the "%{VARIABLE}v" logging parameter.

    *) Feature: the "set $name value" directive.

    *) Bugfix: gcc 4.0 compatibility.

    *) Feature: the --with-openssl-opt=OPTIONS autoconfiguration directive.

src/core/ngx_radix_tree.c

diff --git a/src/core/ngx_radix_tree.c b/src/core/ngx_radix_tree.c
index f8deb21..f82a5e5 100644
--- a/src/core/ngx_radix_tree.c
+++ b/src/core/ngx_radix_tree.c
@@ -17,7 +17,8 @@
     uint32_t           key, mask, inc;
     ngx_radix_tree_t  *tree;
 
-    if (!(tree = ngx_palloc(pool, sizeof(ngx_radix_tree_t)))) {
+    tree = ngx_palloc(pool, sizeof(ngx_radix_tree_t));
+    if (tree == NULL) {
         return NULL;
     }
 
@@ -26,7 +27,8 @@
     tree->start = NULL;
     tree->size = 0;
 
-    if (!(tree->root = ngx_radix_alloc(tree))) {
+    tree->root = ngx_radix_alloc(tree);
+    if (tree->root == NULL) {
         return NULL;
     }
 
@@ -140,7 +142,8 @@
     }
 
     while (bit & mask) {
-        if (!(next = ngx_radix_alloc(tree))) {
+        next = ngx_radix_alloc(tree);
+        if (next == NULL) {
             return NGX_ERROR;
         }
 
@@ -266,7 +269,8 @@
     }
 
     if (tree->size < sizeof(ngx_radix_node_t)) {
-        if (!(tree->start = ngx_palloc(tree->pool, ngx_pagesize))) {
+        tree->start = ngx_palloc(tree->pool, ngx_pagesize);
+        if (tree->start == NULL) {
             return NULL;
         }