Fixes CVE-2014-3618 (heap overflow in formisc.c allowing denial of
service and potential remote execution of arbitrary code).
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-3618

Source:
http://seclists.org/oss-sec/2014/q3/495

Adopted by Debian as patch '27':
https://sources.debian.net/src/procmail/3.22-25/debian/patches/27/

--- a/src/formisc.c
+++ b/src/formisc.c
@@ -84,12 +84,11 @@
 	case '"':*target++=delim='"';start++;
       }
      ;{ int i;
-	do
+	while(*start)
 	   if((i= *target++= *start++)==delim)	 /* corresponding delimiter? */
 	      break;
 	   else if(i=='\\'&&*start)		    /* skip quoted character */
 	      *target++= *start++;
-	while(*start);						/* anything? */
       }
      hitspc=2;
    }
