lib: warn, but don't fail on error reading serial number or version

lib: fix Windows build with OpenSSL 1.1.1
ykcs11: fix size_t/unsigned long type mismatch on Windows x64

lib/internal.c

@@ -1,6 +1,5 @@
 #ifdef _WIN32
 #include <windows.h>
-#include <strsafe.h>
 #ifdef _MSC_VER
 #define strcasecmp _stricmp
 #endif
@@ -24,6 +23,10 @@
 #include <stdlib.h>
 #include <string.h>
 
+#ifdef _WIN32
+#include <strsafe.h> /* must be included after openssl headers */
+#endif
+
 #include "internal.h"
 
 /*

lib/ykpiv.c

@@ -305,7 +305,19 @@ ykpiv_rc _ykpiv_select_application(ykpiv_state *state) {
    * will result in another selection of the PIV applet. */
 
   res = _ykpiv_get_version(state, NULL);
-  if (res == YKPIV_OK) res = _ykpiv_get_serial(state, NULL, false);
+  if (res != YKPIV_OK) {
+    if (state->verbose) {
+      fprintf(stderr, "Failed to retrieve version: '%s'\n", ykpiv_strerror(res));
+    }
+  }
+
+  res = _ykpiv_get_serial(state, NULL, false);
+  if (res != YKPIV_OK) {
+    if (state->verbose) {
+      fprintf(stderr, "Failed to retrieve serial number: '%s'\n", ykpiv_strerror(res));
+    }
+    res = YKPIV_OK;
+  }
 
   return res;
 }