Don't initialize globals to zero (or NULL)

Some compilers and linkers aren't smart enough to optimize this,
as global variables are implictly initialized to zero.  As a
result, binaries are a bit smaller as more goes in the .bss and
less in the text section.

git-svn-id: https://svn.musicpd.org/mpd/trunk@5254 09075e82-0dd4-0310-85a5-a0d7c8717e4f

src/decode.c

@@ -37,7 +37,7 @@
 #include <unistd.h>
 #include <string.h>
 
-static int decode_pid = 0;
+static int decode_pid;
 
 void decodeSigHandler(int sig, siginfo_t * si, void *v)
 {