BUILD: stick-table: fix build errors introduced by last stick-table change

Last commit 1a693fc2fd ("MEDIUM: cli: Allow multiple filter entries for "show table"")
broke the build at two places:

  src/stick_table.c: In function 'table_prepare_data_request':
  src/stick_table.c:3620:33: warning: ordered comparison of pointer with integer zero [-Wextra]
  src/stick_table.c: In function 'cli_io_handler_table':
  src/stick_table.c:3763:5: error: 'for' loop initial declarations are only allowed in C99 mode
  src/stick_table.c:3763:5: note: use option -std=c99 or -std=gnu99 to compile your code
  make: *** [src/stick_table.o] Error 1

This patch fixes both. No backport needed.
diff --git a/src/stick_table.c b/src/stick_table.c
index 1393b1f..e4eca98 100644
--- a/src/stick_table.c
+++ b/src/stick_table.c
@@ -3617,7 +3617,7 @@
 			return cli_err(appctx, "Data type not stored in this table\n");
 
 		appctx->ctx.table.data_op[i] = get_std_op(args[4+3*i]);
-		if (appctx->ctx.table.data_op < 0)
+		if (appctx->ctx.table.data_op[i] < 0)
 			return cli_err(appctx, "Require and operator among \"eq\", \"ne\", \"le\", \"ge\", \"lt\", \"gt\"\n");
 
 		if (!*args[5] || strl2llrc(args[5+3*i], strlen(args[5+3*i]), &appctx->ctx.table.value[i]) != 0)
@@ -3755,12 +3755,12 @@
 			if (appctx->ctx.table.data_type[0] >= 0) {
 				/* we're filtering on some data contents */
 				void *ptr;
-				int dt;
+				int dt, i;
 				signed char op;
 				long long data, value;
 
 
-				for (int i = 0; i < STKTABLE_FILTER_LEN; i++) {
+				for (i = 0; i < STKTABLE_FILTER_LEN; i++) {
 					if (appctx->ctx.table.data_type[i] == -1)
 						break;
 					dt = appctx->ctx.table.data_type[i];