Added support for symbol codepage.
Improved handling of undefined codepage characters.

diff --git a/unicode/c_10079.c b/unicode/c_10079.c
index 3ff2573..09d4f32 100644
--- a/unicode/c_10079.c
+++ b/unicode/c_10079.c
@@ -36,7 +36,7 @@
     0x00ff, 0x0178, 0x2044, 0x00a4, 0x00d0, 0x00f0, 0x00de, 0x00fe,
     0x00fd, 0x00b7, 0x201a, 0x201e, 0x2030, 0x00c2, 0x00ca, 0x00c1,
     0x00cb, 0x00c8, 0x00cd, 0x00ce, 0x00cf, 0x00cc, 0x00d3, 0x00d4,
-    0x00f0, 0x00d2, 0x00da, 0x00db, 0x00d9, 0x0131, 0x02c6, 0x02dc,
+    0x003f, 0x00d2, 0x00da, 0x00db, 0x00d9, 0x0131, 0x02c6, 0x02dc,
     0x00af, 0x02d8, 0x02d9, 0x02da, 0x00b8, 0x02dd, 0x02db, 0x02c7
 };