Newer GCC mis-compiles the lsb_release reader function.

Signed-off-by: Robin H. Johnson <robbat2@gentoo.org>

--- cfengine-2.2.10/src/misc.c	2009-02-10 21:55:36.000000000 -0800
+++ cfengine-2.2.10/src/misc.c	2020-01-06 17:58:07.049226386 -0800
@@ -1187,6 +1187,7 @@ if ((fp = cfpopen(VBUFF, "r")) == NULL)
 
 if (ReadLine(VBUFF, CF_BUFSIZE, fp))
    {
+   Debug4("(%s)",VBUFF);
    char * buffer = VBUFF;
    strsep(&buffer, ":");
    
@@ -1198,7 +1199,8 @@ if (ReadLine(VBUFF, CF_BUFSIZE, fp))
    info = buffer;
    while((*buffer != '\0') && !isspace(*buffer))
       {
-      *buffer = tolower(*buffer++);
+      *buffer = tolower(*buffer);
+      buffer++;
       }
    
    *buffer = '\0';
