fix pcre allocation on Win32, the bug had been introduced in r3326

src/core/ngx_regex.c

diff --git a/src/core/ngx_regex.c b/src/core/ngx_regex.c
index 18e3c26..984a28a 100644
--- a/src/core/ngx_regex.c
+++ b/src/core/ngx_regex.c
@@ -35,11 +35,9 @@
         return;
     }
 
-#else
+#endif
 
     ngx_pcre_pool = pool;
-
-#endif
 }
 
 
@@ -55,11 +53,9 @@
         return;
     }
 
-#else
+#endif
 
     ngx_pcre_pool = NULL;
-
-#endif
 }