don't include os_compat.h

When there are standardized headers, use these instead of the bloated
os_compat.h.

src/inputPlugins/aac_plugin.c

@@ -25,6 +25,7 @@
 #include "../utils.h"
 #include "../log.h"
 
+#include <assert.h>
 #include <faad.h>
 
 /* all code here is either based on or copied from FAAD2's frontend code */

src/inputPlugins/audiofile_plugin.c

@@ -24,6 +24,7 @@
 
 #include "../log.h"
 
+#include <sys/stat.h>
 #include <audiofile.h>
 
 /* pick 1020 since its devisible for 8,16,24, and 32-bit audio */

src/inputPlugins/flac_plugin.c

@@ -23,6 +23,8 @@
 #include "../utils.h"
 #include "../log.h"
 
+#include <assert.h>
+
 /* this code was based on flac123, from flac-tools */
 
 static flac_read_status flacRead(mpd_unused const flac_decoder * flacDec,

src/inputPlugins/mp4_plugin.c

@@ -25,6 +25,7 @@
 
 #include "../mp4ff/mp4ff.h"
 
+#include <limits.h>
 #include <faad.h>
 /* all code here is either based on or copied from FAAD2's frontend code */