Bug fix: -as mkisofs did not properly unescape target part of pathspecs

libisoburn/trunk/xorriso/opts_a_c.c

@@ -95,6 +95,7 @@ int Xorriso_option_acl(struct XorrisO *xorriso, char *mode, int flag)
 /* @param flag bit0=do not report the added item
                bit1=do not reset pacifier, no final pacifier message
                bit2= prepend ISO working directory in any case
+               bit3= unescape \\
 */
 int Xorriso_option_add(struct XorrisO *xorriso, int argc, char **argv,
                        int *idx, int flag)
@@ -128,9 +129,12 @@ int Xorriso_option_add(struct XorrisO *xorriso, int argc, char **argv,
      else
        rpt= wpt= source;
      for(; *rpt!=0; rpt++) {
-       if(*rpt=='\\')
+       if(*rpt=='\\') {
          if(*(rpt+1)=='=')
      continue;
+         if((flag & 8) && *(rpt + 1) == '\\')
+           rpt++;
+       }
        *(wpt++)= *rpt;
      }
      *wpt= 0;