[pdf2htmlEX_exe] Append LD_LIBRARY_PATH, if exists, not overwrite

Author: ViliusSutkus89

pdf2htmlEX/src/main/java/com/viliussutkus89/android/pdf2htmlex/pdf2htmlEX_exe.java

@@ -52,7 +52,10 @@ public pdf2htmlEX_exe(@NonNull Context ctx) {
     super(ctx, null);
 
     String nativeLibraryDir = ctx.getApplicationInfo().nativeLibraryDir;
-    String LD_LIBRARY_PATH = m_environment.put("LD_LIBRARY_PATH", nativeLibraryDir);
+    String oldLibraryPath = m_environment.put("LD_LIBRARY_PATH", nativeLibraryDir);
+    if (null != oldLibraryPath) {
+      m_environment.put("LD_LIBRARY_PATH", oldLibraryPath + ":" + nativeLibraryDir);
+    }
 
     File externalExecutable = new File(nativeLibraryDir, "libpdf2htmlEX-exe_not_lib.so");