compilation error for mplayer plugin

[cqst <cqst@free.fr>]

hello everyone,
I try to compile the mplayer plugin for my web browser.
./configure is OK but when I laucnh "make" I got that :
----------------
g++ -c -o plugin-support.o -Wall -g -O2   -g -O2  -DXP_UNIX -DMOZ_X11 -I../gecko-sdk -I../gecko-sdk/include -Iinclude -fPIC -DXPCOM_GLUE -DMOZILLA_STRICT_API  -pthread -I/usr/include/glib-2.0 -I/usr/lib/glib-2.0/include   -DX_ENABLED  Source/plugin-support.cpp
Source/plugin-support.cpp: Dans function « int URLcmp(const char*, const char*) 
   »:
Source/plugin-support.cpp:302: error: `rpl_malloc' undeclared (first use this 
   function)
Source/plugin-support.cpp:302: error: (Each undeclared identifier is reported 
   only once for each function it appears in.)
make: *** [plugin-support.o] Erreur 1
zsh: exit 2     make
----------------

I've installed libc-dev and xlibs-dev but it doesnt solved the problem...
any help ?

thx by advance