OTHER: #include <stdio.h> for fprintf

[dchokola]

Fails to build with: gcc (Debian 8.2.0-10) 8.2.0

gcc pkg-config --cflags xmms2-client glib-2.0 -Wall -c -o tut1.o tut1.c
tut1.c: In function ‘main’:
tut1.c:69:3: warning: implicit declaration of function ‘fprintf’ [-Wimplicit-function-declaration]
fprintf (stderr, "OOM!\n");
^~~~~~~
tut1.c:69:3: warning: incompatible implicit declaration of built-in function ‘fprintf’
tut1.c:69:3: note: include ‘<stdio.h>’ or provide a declaration of ‘fprintf’
tut1.c:21:1:
+#include <stdio.h>

tut1.c:69:3:
fprintf (stderr, "OOM!\n");
^~~~~~~
tut1.c:69:12: error: ‘stderr’ undeclared (first use in this function)
fprintf (stderr, "OOM!\n");
^~~~~~
tut1.c:69:12: note: ‘stderr’ is defined in header ‘<stdio.h>’; did you forget to ‘#include <stdio.h>’?
tut1.c:69:12: note: each undeclared identifier is reported only once for each function it appears in
tut1.c:86:3: warning: incompatible implicit declaration of built-in function ‘fprintf’
fprintf (stderr, "Connection failed: %s\n",
^~~~~~~
tut1.c:86:3: note: include ‘<stdio.h>’ or provide a declaration of ‘fprintf’
tut1.c:121:3: warning: incompatible implicit declaration of built-in function ‘fprintf’
fprintf (stderr, "playback start returned error, %s",
^~~~~~~
tut1.c:121:3: note: include ‘<stdio.h>’ or provide a declaration of ‘fprintf’
make: *** [Makefile:7: tut1.o] Error 1