Don't convert/store small integers to doubles when reading/writing .ini files

Fix issue #760

UINT_TO_JSVAL automatically handles the storage as the necsesary underlying
type in the JS engine.

Values > 0x7fffffff (2147483647) will still be stored (and re-written) as
doubles and could be problematic.

src/sbbs3/js_file.c

@@ -756,7 +756,7 @@ static jsval get_value(JSContext *cx, char* value, bool blanks)
 		if(f)
 			val=DOUBLE_TO_JSVAL(atof(value));
 		else
-			val=DOUBLE_TO_JSVAL((double)strtoul(value,NULL,10));
+			val=UINT_TO_JSVAL(strtoul(value,NULL,10));
 		return(val);
 	}
 	/* hexadecimal number? */
@@ -765,7 +765,7 @@ static jsval get_value(JSContext *cx, char* value, bool blanks)
 			if(!isxdigit((uchar)*p))
 				break;
 		if(*p==0) {
-			val=DOUBLE_TO_JSVAL((double)strtoul(value,NULL,0));
+			val=UINT_TO_JSVAL(strtoul(value,NULL,0));
 			return(val);
 		}
 	}