Moved ngx_array_t definition from ngx_core.h to ngx_array.h.

src/core/ngx_array.h

diff --git a/src/core/ngx_array.h b/src/core/ngx_array.h
index 6a60e30..a0f2a74 100644
--- a/src/core/ngx_array.h
+++ b/src/core/ngx_array.h
@@ -13,13 +13,13 @@
 #include <ngx_core.h>
 
 
-struct ngx_array_s {
+typedef struct {
     void        *elts;
     ngx_uint_t   nelts;
     size_t       size;
     ngx_uint_t   nalloc;
     ngx_pool_t  *pool;
-};
+} ngx_array_t;
 
 
 ngx_array_t *ngx_array_create(ngx_pool_t *p, ngx_uint_t n, size_t size);

src/core/ngx_core.h

diff --git a/src/core/ngx_core.h b/src/core/ngx_core.h
index bccc603..dfcf2d5 100644
--- a/src/core/ngx_core.h
+++ b/src/core/ngx_core.h
@@ -15,7 +15,6 @@
 typedef struct ngx_pool_s        ngx_pool_t;
 typedef struct ngx_chain_s       ngx_chain_t;
 typedef struct ngx_log_s         ngx_log_t;
-typedef struct ngx_array_s       ngx_array_t;
 typedef struct ngx_open_file_s   ngx_open_file_t;
 typedef struct ngx_command_s     ngx_command_t;
 typedef struct ngx_file_s        ngx_file_t;