restricted incoming mfct to correct range. Specifiation allows 3*5 bit => any mfct must be smaller than 32767.

src/meters.cc

@@ -96,9 +96,9 @@ bool DriverInfo::detect(uint16_t mfct, uchar type, uchar version)
     for (auto &dd : detect_)
     {
         if (dd.mfct == 0 && dd.type == 0 && dd.version == 0) continue; // Ignore drivers with no detection.
-        if (dd.mfct == mfct && dd.type == type && dd.version == version) return true;
-        //some meters send mfct where the first character ist lower case, therefor % ( 32 * 1024 ) to convert mfct to upper case
-        if (dd.mfct == mfct % ( 32 * 1024 ) && dd.type == type && dd.version == version) return true;
+        //some meters send mfct where the first character ist lower case, which results in mfct which are bigger
+        //than 32767, therefore restrict mfct to correct range
+        if (dd.mfct == (mfct & 0x7fff) && dd.type == type && dd.version == version) return true;
     }
     return false;
 }