Fix parsing bots in arena info with trailing spaces

q3_ui would shown bot at index of number of bots in list.
game would send empty name to addbot command and command would think skill
(i.e., 2.000000) was the bot name.

code/game/g_bot.c

@@ -817,7 +817,7 @@ static void G_SpawnBots( char *botList, int baseDelay ) {
 		while( *p && *p == ' ' ) {
 			p++;
 		}
-		if( !p ) {
+		if( !*p ) {
 			break;
 		}
 

code/q3_ui/ui_splevel.c

@@ -183,7 +183,7 @@ static void UI_SPLevelMenu_SetBots( void ) {
 		while( *p && *p == ' ' ) {
 			p++;
 		}
-		if( !p ) {
+		if( !*p ) {
 			break;
 		}
 

code/q3_ui/ui_startserver.c

@@ -1076,7 +1076,7 @@ static void ServerOptions_InitBotNames( void ) {
 		while( *p && *p == ' ' ) {
 			p++;
 		}
-		if( !p ) {
+		if( !*p ) {
 			break;
 		}