Fix bool casting.

A true value is any text that starts with `t` (case insensitive) or
any non-zero integer.

bin/fwr.py

@@ -6,11 +6,19 @@ Fixed width record importing functions.
 
 import builtins
 
+def to_bool (v):
+	try:
+		return bool(int(v))
+	except ValueError:
+		if type(v) == str:
+			return v.strip().lower().startswith("t")
+		return False
+
 transform = {
 	"int": lambda v: builtins.int(float(v)),
 	"float": float,
 	"string": str,
-	"bool": bool
+	"bool": to_bool
 }
 
 def parse_line (line, fields):