Silence static analysis warnings.

kernel/elf.cpp

@@ -215,6 +215,7 @@ uintptr_t Load(const void* file_ptr, size_t file_size, Auxiliary* aux)
 				if ( available < descsz_aligned )
 					return errno = EINVAL, 0;
 				available -= descsz_aligned;
+				(void) available;
 				notes_offset += note_header_size + namesz_aligned + descsz_aligned;
 
 				const char* name = (const char*) (note + note_header_size);

kernel/interrupt.cpp

@@ -147,6 +147,7 @@ bool ScheduleWork(void (*handler)(void*, void*, size_t),
 	assert(payload || !payload_size);
 
 	struct worker_package package;
+	memset(&package, 0, sizeof(package));
 	package.payload_size = payload_size;
 	package.handler = handler;
 	package.handler_context = handler_context;

libc/grp/fgetgrent_r.cpp

@@ -212,7 +212,6 @@ int fgetgrent_r(FILE* restrict fp,
 		goto range_failure;
 
 	result->gr_mem = (char**) (buf + buf_used);
-	buf_used += member_list_bytes;
 
 	char* member_parse_str = member_string;
 	for ( size_t i = 0; i < num_members + 1; i++ )