Skip indentation and comments in io_extract_data()

We actually only use this function to parse configuration data.
Currently, this probably is the best way to do some common
preprocessing.

Signed-off-by: Lukas Fleischer <calcurse@cryptocrack.de>

src/io.c

@@ -806,9 +806,10 @@ io_extract_data (char *dst_data, const char *org, int len)
 {
   int i;
 
+  for (; *org == ' ' || *org == '\t'; org++);
   for (i = 0; i < len - 1; i++)
     {
-      if (*org == '\n' || *org == '\0')
+      if (*org == '\n' || *org == '\0' || *org == '#')
         break;
       *dst_data++ = *org++;
     }