Merge pull request ibmruntimes#483 from KostasTsiounis/fix_native_flag_check

Properly check if jdk.native.openssl.lib property is set

Author: keithc-ca

closed/src/java.base/share/classes/jdk/crypto/jniprovider/NativeCrypto.java

@@ -116,7 +116,7 @@ private static long loadCryptoLibraries() {
                     System.err.println("Native crypto library load succeeded - using native crypto library.");
                 }
             } else {
-                if (!nativeLibName.isEmpty()) {
+                if ((nativeLibName != null) && !nativeLibName.isEmpty()) {
                     throw new RuntimeException(nativeLibName + " is not available, crypto libraries are not loaded");
                 }
             }