supress two compiler warnings

clib/linenoise.c

@@ -108,6 +108,7 @@
 #include <stdlib.h>
 #include <stdio.h>
 #include <errno.h>
+#include <strings.h>
 #include <string.h>
 #include <stdlib.h>
 #include <ctype.h>

ml_profiler.cpp

@@ -79,7 +79,7 @@ void MlPerfMon::restore_callstack_position(size_t to_position) {
 }
 
 void MlPerfMon::clear_callstack() {
-    call_stack.empty();
+    bool e = call_stack.empty();
 }
 
 void MlPerfMon::print_results() const {