Fix error for the last commit

[rboxeur]

The latest commit won't work

Running

./configure --with-d3dadapter --with-d3dadapter-dri2-fallback

I got

d3dadapter9.so.1 not found in '/usr/lib/i386-linux-gnu/d3d'
d3dadapter9.so.1 not found in '=/usr/i686-linux-gnu/lib32/d3d'
d3dadapter9.so.1 not found in '=/usr/local/lib32/d3d'
d3dadapter9.so.1 not found in '=/lib32/d3d'
d3dadapter9.so.1 not found in '=/usr/lib32/d3d'
d3dadapter9.so.1 not found in '=/usr/i686-linux-gnu/lib/d3d'
d3dadapter9.so.1 not found in '=/usr/local/lib/i386-linux-gnu/d3d'
d3dadapter9.so.1 not found in '=/usr/local/lib/d3d'
d3dadapter9.so.1 not found in '=/lib/i386-linux-gnu/d3d'
d3dadapter9.so.1 not found in '=/lib/d3d'
d3dadapter9.so.1 not found in '=/usr/lib/i386-linux-gnu/d3d'
d3dadapter9.so.1 not found in '=/usr/lib/d3d'
configure: error: d3dadapter9.so.1 module not found, Gallium Nine won't be supported.
This is an error since --with-d3dadapter was requested.

In my config.log I got a lot of errors like below

...
| #define SONAME_LIBGL "libGL.so.1"
| #define SONAME_LIBOSMESA "libOSMesa.so.8"
| #define SONAME_D3DADAPTER9 "d3dadapter9.so.1"
| /* end confdefs.h. */
| #include <dlfcn.h>
| #include <stdlib.h>
| int
| main ()
| {
| void *handle = dlopen("/usr/lib/i386-linux-gnu/d3d" "/" SONAME_D3DADAPTER9, RTLD_GLOBAL | RTLD_NOW);
| exit((handle && dlsym(handle, "D3DAdapter9GetProc")) ? 0 : 1)
| ;
| return 0;
| }
configure:10844: gcc -o conftest -g -O2 -I/usr/include/libdrm -I./include -ldl conftest.c >&5
/tmp/ccxPjCHZ.o: In function main': /opt/Sources/tmp/Wine-Staging-1.8-rc4/wine-ixit_2015-12-15/conftest.c:163: undefined reference todlopen'
/opt/Sources/tmp/Wine-Staging-1.8-rc4/wine-ixit_2015-12-15/conftest.c:164: undefined reference to `dlsym'
collect2: error: ld returned 1 exit status
configure:10844: $? = 1
configure: program exited with status 1
configure: failed program was: