corrected type of variable to get correct rank

- adjusted tests/support/server.tcl to correctly work with Redis for Windows

Fixes #23.

src/t_zset.c

@@ -3041,7 +3041,7 @@ void zrankGenericCommand(client *c, int reverse) {
     robj *key = c->argv[1];
     robj *ele = c->argv[2];
     robj *zobj;
-    PORT_ULONG rank;
+    PORT_LONG rank;
 
     if ((zobj = lookupKeyReadOrReply(c,key,shared.nullbulk)) == NULL ||
         checkType(c,zobj,OBJ_ZSET)) return;

tests/support/server.tcl

@@ -305,7 +305,7 @@ proc start_server {options {code undefined}} {
 
     # Wait for actual startup
     while {![info exists _pid]} {
-        regexp {PID:\s(\d+)} [exec cat $stdout] _ _pid
+        regexp -nocase {PID[:=]\s*(\d+)} [exec cat $stdout] _ _pid
         after 100
     }
 
@@ -334,7 +334,7 @@ proc start_server {options {code undefined}} {
 
         while 1 {
             # check that the server actually started and is ready for connections
-            if {[exec grep "ready to accept" | wc -l < $stdout] > 0} {
+            if {[exec grep -i "ready to accept" | wc -l < $stdout] > 0} {
                 break
             }
             after 10