implemented gethu

src/userinput.c

@@ -184,4 +184,10 @@ long long getlld(char *message, long long *min, long long *max) {
     LD(min)
     LD(max)
     return getNumber(message, minld, maxld, NULL, NULL, LLONG_MIN, LLONG_MAX);
+}
+
+unsigned short gethu(char *message, unsigned short *min, unsigned short *max) {
+    LD(min)
+    LD(max)
+    return getNumber(message, minld, maxld, NULL, NULL, 0, USHRT_MAX);
 }