client: wscript: add winmm.lib dependency

This fixes a linker error when compiling for win32 with Goldsrc Support enabled.

cl_dll/wscript

@@ -10,12 +10,15 @@ def options(opt):
 	return
 
 def configure(conf):
-	if conf.env.GOLDSRC and conf.env.DEST_OS != 'win32':
-		conf.check_cc(lib='dl')
-
 	if conf.env.DEST_OS == 'win32':
 		conf.check_cxx(lib='user32')
 
+	if conf.env.GOLDSRC:
+		if conf.env.DEST_OS == 'win32':
+			conf.check_cxx(lib='winmm')
+		else:
+			conf.check_cc(lib='dl')
+
 def build(bld):
 	source = bld.path.parent.ant_glob([
 		'pm_shared/*.c'
@@ -101,12 +104,15 @@ def build(bld):
 		defines += ['GOLDSOURCE_SUPPORT']
 
 	libs = []
-	if bld.env.GOLDSRC and bld.env.DEST_OS != 'win32':
-		libs += ['DL']
-
 	if bld.env.DEST_OS == 'win32':
 		libs += ["USER32"]
 
+	if bld.env.GOLDSRC:
+		if bld.env.DEST_OS == 'win32':
+			libs += ["WINMM"]
+		else:
+			libs += ['DL']
+
 	if bld.env.DEST_OS not in ['android', 'dos']:
 		install_path = os.path.join(bld.env.GAMEDIR, bld.env.CLIENT_DIR)
 	else: