Various small errors in the RSRD specific weapons file

In the file rsrd_equip_weap_melee_specific.lst, I believe I have found the following errors, plus a few trivial improvements.

Dwarven Thrower: a warhammer, weighs 8 but should weigh 5.
Flame Tongue: the ranged attack should have a 30 ft. limit rather than a 30 ft. range increment.
Frost Brand: a greatsword, weighs 15 but should weigh 8.
Life-Drinker: a greataxe, weighs 15 but should weigh 12.
Mace of Smiting: is Steel, should be Adamantine.
Trident of Fish Command: weighs 5, should weigh 4.
Trident of Warning: weighs 5, should weigh 4.

More trivially, in the Rapier of Puncturing, Trident of Fish Command, and Trident of Warning, Standard should be Specific.

With the Adamantine and other Masterwork items, they already should have +1 for that reason and so don't need a separate +1 enhancement to hit.