compiler fixes

The compiler flag -s is not necessary and causes build failure on some
systems (macOS, clang compilers) due to it being deprecated.
Additionally, on those same systems, tools/aif2pcm/main.c failed to
compile due to an overly cautious compiler not liking some struct
declarations.
These changes afaik do not affect other builds.

tools/aif2pcm/main.c

@@ -469,12 +469,12 @@ do { \
 void aif2pcm(const char *aif_filename, const char *pcm_filename, bool compress)
 {
 	struct Bytes *aif = read_bytearray(aif_filename);
-	AifData aif_data = {0};
+	AifData aif_data;
 	read_aif(aif, &aif_data);
 
 	int header_size = 0x10;
 	struct Bytes *pcm;
-	struct Bytes output = {0};
+	struct Bytes output;
 
 	if (compress)
 	{