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-rw-r--r--src/java/com/jogamp/gluegen/JavaCallbackEmitter.java3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/java/com/jogamp/gluegen/JavaCallbackEmitter.java b/src/java/com/jogamp/gluegen/JavaCallbackEmitter.java
index 247d3ac..8263372 100644
--- a/src/java/com/jogamp/gluegen/JavaCallbackEmitter.java
+++ b/src/java/com/jogamp/gluegen/JavaCallbackEmitter.java
@@ -878,7 +878,8 @@ public final class JavaCallbackEmitter {
final String baseArgName = info.cbFuncBinding.getArgumentName(i);
if( i != info.cbFuncUserParamIdx && currentJavaType.isCompoundTypeWrapper() ) {
final String cBaseArgName = CodeGenUtils.capitalizeString( baseArgName );
- unit.emit( "(*env)->CallStaticObjectMethod(env, cbClazzArg" + cBaseArgName + ", cbMethodArg" + cBaseArgName + ", " + baseArgName + "_jni)" );
+ final String jniArgName = baseArgName + "_jni";
+ unit.emit( jniArgName + " != NULL ? " + "(*env)->CallStaticObjectMethod(env, cbClazzArg" + cBaseArgName + ", cbMethodArg" + cBaseArgName + ", " + jniArgName + ") : NULL" );
} else {
unit.emit( baseArgName + "_jni" );
}