Avert a crash and file descriptor leak in yank-media

* java/org/gnu/emacs/EmacsNative.java (close): New declaration.

* java/org/gnu/emacs/EmacsSdk11Clipboard.java
(getClipboardData): Catch SecurityException and guarantee file
descriptors are closed even if exceptions arise.

* src/android.c (dup): Export another function.

java/org/gnu/emacs/EmacsNative.java

@@ -39,6 +39,9 @@ public final class EmacsNative
   /* Like `dup' in C.  */
   public static native int dup (int fd);
 
+  /* Like `close' in C.  */
+  public static native int close (int fd);
+
   /* Obtain the fingerprint of this build of Emacs.  The fingerprint
      can be used to determine the dump file name.  */
   public static native String getFingerprint ();

java/org/gnu/emacs/EmacsSdk11Clipboard.java

@@ -245,6 +245,8 @@ public final class EmacsSdk11Clipboard extends EmacsClipboard
     if (data == null || data.getItemCount () < 1)
       return null;
 
+    fd = -1;
+
     try
       {
 	uri = data.getItemAt (0).getUri ();
@@ -267,12 +269,34 @@ public final class EmacsSdk11Clipboard extends EmacsClipboard
 	/* Close the original offset.  */
 	assetFd.close ();
       }
+    catch (SecurityException e)
+      {
+	/* Guarantee a file descriptor duplicated or detached is
+	   ultimately closed if an error arises.  */
+
+	if (fd != -1)
+	  EmacsNative.close (fd);
+
+	return null;
+      }
     catch (FileNotFoundException e)
       {
+	/* Guarantee a file descriptor duplicated or detached is
+	   ultimately closed if an error arises.  */
+
+	if (fd != -1)
+	  EmacsNative.close (fd);
+
 	return null;
       }
     catch (IOException e)
       {
+	/* Guarantee a file descriptor duplicated or detached is
+	   ultimately closed if an error arises.  */
+
+	if (fd != -1)
+	  EmacsNative.close (fd);
+
 	return null;
       }
 

src/android.c

@@ -1260,6 +1260,14 @@ NATIVE_NAME (dup) (JNIEnv *env, jobject object, jint fd)
   return dup (fd);
 }
 
+JNIEXPORT jint JNICALL
+NATIVE_NAME (close) (JNIEnv *env, jobject object, jint fd)
+{
+  JNI_STACK_ALIGNMENT_PROLOGUE;
+
+  return close (fd);
+}
+
 JNIEXPORT jstring JNICALL
 NATIVE_NAME (getFingerprint) (JNIEnv *env, jobject object)
 {