Dynamic loading

[CaptainJester]

I can't get dynamic loading to work for DevIL.  I don't have a lot of experience with 'C', so it might be something simple.  The code compiles fine, but I am getting an exception when I run it.  The exception occurs in native code.  Below is the code and the line that the exception occurs in.

void ext_InitializeClass(JNIEnv *env, jclass clazz, ExtGetProcAddressPROC gpa, int num_functions, JavaMethodAndExtFunction *functions) {
    JNINativeMethod *methods;
    JavaMethodAndExtFunction *function;
    void *ext_func_pointer;
    void **ext_function_pointer_pointer;
    JNINativeMethod *method;
    int i;
    if (clazz == NULL) {
        throwException(env, "Null class");
        return;
    }
    methods = (JNINativeMethod *)malloc(num_functions*sizeof(JNINativeMethod));
    for (i = 0; i < num_functions; i++) {
        function = functions + i;
        if (function->ext_function_name != NULL) {
            ext_func_pointer = gpa(function->ext_function_name);
            if (ext_func_pointer == NULL) {
                free(methods);
                throwException(env, "Missing driver symbols");
                return;
            }
            ext_function_pointer_pointer = function->ext_function_pointer;

//********** this is the line where the exception occurs
            *ext_function_pointer_pointer = ext_func_pointer;
//**************************************
        }
        method = methods + i;
        method->name = function->method_name;
        method->signature = function->signature;
        method->fnPtr = function->method_pointer;
    }
    (*env)->RegisterNatives(env, clazz, methods, num_functions);
    free(methods);
}

My code is in CVS in the files extil.c, extil.h, org_lwjgl_devil_IL.c.  In org_lwjgl_devil_IL.c, initNativeStubs is called which calls extil_InitializeClass in extil.c which calls ext_InitializeClass in common_tools.c.  This code is above.

Thanks.

ps.  I don't think the actual error is in the line above.  It is probably something I have done to cause it, but I don't know what that could be.