6888215: memory leak in jpeg plugin

Reviewed-by: igor, prr

src/share/native/sun/awt/image/jpeg/imageioJPEG.c

@@ -1437,6 +1437,7 @@ Java_com_sun_imageio_plugins_jpeg_JPEGImageReader_initJPEGImageReader
         JNU_ThrowByName( env,
                          "java/lang/OutOfMemoryError",
                          "Initializing Reader");
+        free(cinfo);
         return 0;
     }
 
@@ -1473,6 +1474,7 @@ Java_com_sun_imageio_plugins_jpeg_JPEGImageReader_initJPEGImageReader
         JNU_ThrowByName(env,
                         "java/lang/OutOfMemoryError",
                         "Initializing Reader");
+        imageio_dispose((j_common_ptr)cinfo);
         return 0;
     }
     cinfo->src->bytes_in_buffer = 0;
@@ -1489,6 +1491,7 @@ Java_com_sun_imageio_plugins_jpeg_JPEGImageReader_initJPEGImageReader
         JNU_ThrowByName( env,
                          "java/lang/OutOfMemoryError",
                          "Initializing Reader");
+        imageio_dispose((j_common_ptr)cinfo);
         return 0;
     }
     return (jlong) ret;
@@ -2420,8 +2423,7 @@ Java_com_sun_imageio_plugins_jpeg_JPEGImageWriter_initJPEGImageWriter
         JNU_ThrowByName( env,
                          "java/lang/OutOfMemoryError",
                          "Initializing Writer");
-        free(cinfo);
-        free(jerr);
+        imageio_dispose((j_common_ptr)cinfo);
         return 0;
     }
 
@@ -2439,8 +2441,7 @@ Java_com_sun_imageio_plugins_jpeg_JPEGImageWriter_initJPEGImageWriter
         JNU_ThrowByName( env,
                          "java/lang/OutOfMemoryError",
                          "Initializing Writer");
-        free(cinfo);
-        free(jerr);
+        imageio_dispose((j_common_ptr)cinfo);
         return 0;
     }
     return (jlong) ret;