client: fix compile break on Mac

svn path=/trunk/boinc/; revision=17276

checkin_notes

@@ -1618,3 +1618,9 @@ David  16 Feb 2009
         coproc.cpp,h
     win_build/
         libboinc.vcproj
+
+Charlie 13 Feb 2009
+    - client: fix compile break on Mac.
+
+    lib/
+        coproc.cpp

lib/coproc.cpp

@@ -208,7 +208,11 @@ string COPROC_CUDA::get(COPROCS& coprocs) {
         (*__cudaGetDeviceProperties)(&cc.prop, i);
         if (cc.prop.major <= 0) continue;  // major == 0 means emulation
         if (cc.prop.major > 100) continue;  // e.g. 9999 is an error
+#ifdef _WIN32
         cc.drvVersion = Version.drvVersion;
+#else
+        cc.drvVersion = 0;
+#endif
 		cc.description(buf);
 
         if (real_count) {