replace regex with Binary.getString() in GAL signature

Author: BJNFNE

db/Binary/bin.GAL.1.sg

@@ -6,12 +6,8 @@ meta("format", "Gale (.GAL)");
 
 function detect() {
     if (Binary.compare("'Gale'")) {
-        var versionNumber = Binary.getString(4, 3).trim();
-
-        if (/^[A-Z0-9]{3}$/.test(versionNumber)) {
-            sVersion = versionNumber;
-            bDetected = true;
-        }
+        sVersion = File.cleanString(Binary.getString(0x0004));
+        bDetected = true;
     }
 
     return result();