fixed cppcheck warning

git-svn-id: https://svn.code.sf.net/p/speed-dreams/code/trunk@6878 30fe4595-0a0c-4342-8851-515496e4dcbd

Former-commit-id: 6ae67a1f263c1eca43fc27f3f521d14bc2a800f2
Former-commit-id: 0c17d6bc928d4f0bf73fe23cf953fc1daa17b62c

src/modules/graphic/osggraph/Loader/AccException.cpp

@@ -22,9 +22,8 @@
 using namespace acc3d;
 
 Exception::Exception(std::string error) :
-    _error(NULL)
+    _error(error)
 {
-    _error = error;
 }
 
 Exception::~Exception(){}