.bashrc: add func ismsys() and iscygwin()

.bashrc

@@ -195,9 +195,13 @@ iswindows(){
     uname | grep -iE 'windows|MINGW' >/dev/null 2>&1
 }
 
-ismsys(){}
+ismsys(){
+    :
+}
 
-iscygwin(){}
+iscygwin(){
+    :
+}
 
 isdarwin(){
     uname | grep -E 'Darwin' >/dev/null 2>&1
@@ -249,3 +253,4 @@ safe-exec diskinfo
 finger $USER
 LANG=C id
 
+