dump monster and obj weights using --dumpweights

src/allmain.c

@@ -938,6 +938,7 @@ static const struct early_opt earlyopts[] = {
 #endif
     { ARG_DUMPGLYPHIDS, "dumpglyphids", 12, FALSE },
     { ARG_DUMPMONGEN, "dumpmongen", 10, FALSE },
+    { ARG_DUMPWEIGHTS, "dumpweights", 11, FALSE },
 #ifdef WIN32
     { ARG_WINDOWS, "windows", 4, TRUE },
 #endif
@@ -1042,6 +1043,9 @@ argcheck(int argc, char *argv[], enum earlyarg e_arg)
         case ARG_DUMPMONGEN:
             dump_mongen();
             return 2;
+        case ARG_DUMPWEIGHTS:
+            dump_weights();
+            return 2;
 #ifdef CRASHREPORT
         case ARG_BIDSHOW:
             crashreport_bidshow();