Tweak hash function and add test

src/database/crypt.jmc

@@ -1,3 +1,16 @@
+@lazy
+function test_hashInteger($test_val) {
+	$integerToHash = $test_val;
+
+	database.crypt.hashInteger();
+
+	tellraw @a $hashedInteger.toString();
+
+	database.crypt.clean();
+
+	tellraw @a $hashedInteger.toString();
+}
+
 class database.crypt {
 	function hashString() {}
 
@@ -6,12 +19,19 @@ class database.crypt {
 		$cryptConstant = 7;
 		$cryptPrime = 15331;
 
-		$$input = $(integer);
-		$hash = $input;
-		$hash *= $cryptMultiplyer;
-		$hash += $cryptConstant;
-		$hash %= $cryptPrime;
+		#
+		# $integerToHash must already be initialized
+		#
+		$hashedInteger = $integerToHash;
+		$hashedInteger *= $cryptMultiplyer;
+		$hashedInteger += $cryptConstant;
+		$hashedInteger %= $cryptPrime;
 
-		tellraw @a $hash.toString();
+		# run database.crypt.clean() after hased value is used
+	}
+
+	function clean() {
+		scoreboard players reset $integerToHash __variable__;
+		scoreboard players reset $hashInteger  __variable__;
 	}
 }