implemented gethu

src/userinput.c

@@ -185,3 +185,9 @@ long long getlld(char *message, long long *min, long long *max) {
     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);
+}