8040808: Uninitialised memory in OGLBufImgsOps.c, D3DBufImgOps.cpp

Reviewed-by: serb, pchelko

src/share/native/sun/java2d/opengl/OGLBufImgOps.c

@@ -636,6 +636,9 @@ OGLBufImgOps_EnableLookupOp(OGLContext *oglc, jlong pSrcOps,
                 "OGLBufImgOps_EnableLookupOp: short=%d num=%d len=%d off=%d",
                 shortData, numBands, bandLength, offset);
 
+    for (i = 0; i < 4; i++) {
+        bands[i] = NULL;
+    }
     RETURN_IF_NULL(oglc);
     RETURN_IF_NULL(srcOps);
     RESET_PREVIOUS_OP();

src/windows/native/sun/java2d/d3d/D3DBufImgOps.cpp

@@ -201,6 +201,9 @@ D3DBufImgOps_EnableLookupOp(D3DContext *d3dc,
     int i;
     jint flags = 0;
 
+    for (i = 0; i < 4; i++) {
+        bands[i] = NULL;
+    }
     J2dTraceLn4(J2D_TRACE_INFO,
                 "D3DBufImgOps_EnableLookupOp: short=%d num=%d len=%d off=%d",
                 shortData, numBands, bandLength, offset);