Merge lp:~vanvugt/compiz/fix-1018302 into lp:compiz/0.9.8

[Daniel van Vugt]

Fix potentially unterminated string leading to an uninitialized memory
read (LP: #1018302)

This could cause compiz to crash on startup.

[Sam Spilsbury (smspillaz)]

Looks good to me.

review: Approve

=== modified file 'src/main.cpp'
--- src/main.cpp	2012-06-21 07:13:25 +0000
+++ src/main.cpp	2012-06-27 09:27:20 +0000
@@ -213,8 +213,12 @@
     const char *bin = argv[0];
 #ifdef __linux__
     char exe[PATH_MAX];
-    if (readlink ("/proc/self/exe", exe, sizeof(exe)-1) > 0)
+    ssize_t len = readlink ("/proc/self/exe", exe, sizeof(exe)-1);
+    if (len > 0)
+    {
+	exe[len] = '\0';
 	bin = exe;
+    }
 #endif
     if (strchr (bin, '/'))   // dirname needs a '/' to work reliably
     {