Fixed "make dist" target.

CMakeLists.txt

@@ -521,10 +521,12 @@ ELSE(DOXYGEN_FOUND)
 ENDIF(DOXYGEN_FOUND)
 
 IF(UNIX)
+    SET(PHYSFS_TARBALL "${CMAKE_CURRENT_SOURCE_DIR}/../physfs-${PHYSFS_VERSION}.tar.gz")
     ADD_CUSTOM_TARGET(
         dist
-        ./extras/makedist.sh ${PHYSFS_VERSION}
-        COMMENT "Building source tarball..."
+        hg archive -t tgz "${PHYSFS_TARBALL}"
+        WORKING_DIRECTORY "${CMAKE_CURRENT_SOURCE_DIR}"
+        COMMENT "Building source tarball '${PHYSFS_TARBALL}'..."
     )
     ADD_CUSTOM_TARGET(
         uninstall