- removed bogus errno check from Dehacked parser.

This checked errno without first confirming that there has been an error, it is also pointless because the value range check will automatically catch the error case as well.

src/gamedata/d_dehacked.cpp

@@ -1142,7 +1142,7 @@ static int PatchThing (int thingy)
 		size_t linelen = strlen (Line1);
 
 		// Supported value range is all valid representations of signed int and unsigned int.
-		if (errno == ERANGE || val < INT_MIN || val > UINT_MAX)
+		if (val < INT_MIN || val > UINT_MAX)
 		{
 			Printf("Bad numeric constant %s for %s\n", Line2, Line1);
 		}