libtest: call PR_Cleanup() on exit if NSPR is used

This prevents valgrind from reporting possibly lost memory that NSPR
uses for file descriptor cache and other globally allocated internal
data structures.

Reported-by: Štefan Kremeň

tests/libtest/Makefile.am

@@ -62,8 +62,8 @@ if USE_EXPLICIT_LIB_DEPS
 SUPPORTFILES_LIBS = $(top_builddir)/lib/libcurl.la @LIBCURL_LIBS@
 TESTUTIL_LIBS = $(top_builddir)/lib/libcurl.la @LIBCURL_LIBS@
 else
-SUPPORTFILES_LIBS = $(top_builddir)/lib/libcurl.la @CURL_NETWORK_LIBS@
-TESTUTIL_LIBS = $(top_builddir)/lib/libcurl.la @CURL_NETWORK_AND_TIME_LIBS@
+SUPPORTFILES_LIBS = $(top_builddir)/lib/libcurl.la @CURL_NETWORK_LIBS@ @NSS_LIBS@
+TESTUTIL_LIBS = $(top_builddir)/lib/libcurl.la @CURL_NETWORK_AND_TIME_LIBS@ @NSS_LIBS@
 endif
 
 # Dependencies (may need to be overriden)

tests/libtest/first.c

@@ -33,6 +33,10 @@
 #  include <fcntl.h> /* for setmode() */
 #endif
 
+#ifdef USE_NSS
+#include <nspr.h>
+#endif
+
 #ifdef CURLDEBUG
 #  define MEMDEBUG_NODEFINES
 #  include "memdebug.h"
@@ -128,6 +132,7 @@ char *hexdump(unsigned char *buffer, size_t len)
 int main(int argc, char **argv)
 {
   char *URL;
+  int result;
 
 #ifdef O_BINARY
 #  ifdef __HIGHC__
@@ -166,5 +171,13 @@ int main(int argc, char **argv)
 
   fprintf(stderr, "URL: %s\n", URL);
 
-  return test(URL);
+  result = test(URL);
+
+#ifdef USE_NSS
+  if(PR_Initialized())
+    /* prevent valgrind from reporting possibly lost memory (fd cache, ...) */
+    PR_Cleanup();
+#endif
+
+  return result;
 }