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C89 build fixes.

Recent changes introduced a couple of non-C89-compatible mixed
declarations and code.

--- a/filling.c

+++ b/filling.c

@@ -1289,10 +1289,10 @@

 static key_label *game_request_keys(const game_params *params, int *nkeys)

 {

+    int i;

     key_label *keys = snewn(11, key_label);

-    *nkeys = 11;

-    int i;

+    *nkeys = 11;

     for(i = 0; i < 10; ++i)

     {

--- a/unequal.c

+++ b/unequal.c

@@ -1282,12 +1282,12 @@

 static key_label *game_request_keys(const game_params *params, int *nkeys)

 {

+    int i;

     int order = params->order;

     char off = (order > 9) ? '0' : '1';

     key_label *keys = snewn(order + 1, key_label);

     *nkeys = order + 1;

-    int i;

     for(i = 0; i < order; i++) {

         if (i==10) off = 'a'-10;

         keys[i].button = i + off;