Geo: fixed warnings when removing nonexistent ranges.

geo $geo {
    ranges;

    10.0.0.0-10.0.0.255 test;

    delete 10.0.1.0-10.0.1.255;     # should warn

    delete 10.0.0.0-10.0.0.255;
    delete 10.0.0.0-10.0.0.255;     # should warn
}

src/http/modules/ngx_http_geo_module.c

diff --git a/src/http/modules/ngx_http_geo_module.c b/src/http/modules/ngx_http_geo_module.c
index 2794548..21b4b33 100644
--- a/src/http/modules/ngx_http_geo_module.c
+++ b/src/http/modules/ngx_http_geo_module.c
@@ -990,7 +990,7 @@
 
         a = (ngx_array_t *) ctx->high.low[h];
 
-        if (a == NULL) {
+        if (a == NULL || a->nelts == 0) {
             warn = 1;
             goto next;
         }
@@ -1009,13 +1009,9 @@
                 break;
             }
 
-            if (s != (ngx_uint_t) range[i].start
-                && e != (ngx_uint_t) range[i].end)
-            {
-                continue;
+            if (i == a->nelts - 1) {
+                warn = 1;
             }
-
-            warn = 1;
         }
 
     next:

src/stream/ngx_stream_geo_module.c

diff --git a/src/stream/ngx_stream_geo_module.c b/src/stream/ngx_stream_geo_module.c
index 5e91c46..2204546 100644
--- a/src/stream/ngx_stream_geo_module.c
+++ b/src/stream/ngx_stream_geo_module.c
@@ -940,7 +940,7 @@
 
         a = (ngx_array_t *) ctx->high.low[h];
 
-        if (a == NULL) {
+        if (a == NULL || a->nelts == 0) {
             warn = 1;
             goto next;
         }
@@ -959,13 +959,9 @@
                 break;
             }
 
-            if (s != (ngx_uint_t) range[i].start
-                && e != (ngx_uint_t) range[i].end)
-            {
-                continue;
+            if (i == a->nelts - 1) {
+                warn = 1;
             }
-
-            warn = 1;
         }
 
     next: