(svn r27896) -Fix: some warnings

src/3rdparty/squirrel/squirrel/sqvm.cpp

@@ -1102,7 +1102,7 @@ exception_trap:
 		_lasterror = currerror;
 		return false;
 	}
-	assert(0);
+	NOT_REACHED();
 }
 
 bool SQVM::CreateClassInstance(SQClass *theclass, SQObjectPtr &inst, SQObjectPtr &constructor)

src/fios.cpp

@@ -77,7 +77,7 @@ void FileList::BuildFileList(AbstractFileType abstract_filetype, SaveLoadOperati
 {
 	this->Clear();
 
-	assert(fop == SLO_LOAD || SLO_SAVE);
+	assert(fop == SLO_LOAD || fop == SLO_SAVE);
 	switch (abstract_filetype) {
 		case FT_NONE:
 			break;

src/pathfinder/npf/npf.cpp

@@ -1236,6 +1236,7 @@ bool NPFTrainFindNearestSafeTile(const Train *v, TileIndex tile, Trackdir trackd
 	/* We set this in case the target is also the start tile, we will just
 	 * return a not found then */
 	start1.user_data[NPF_TRACKDIR_CHOICE] = INVALID_TRACKDIR;
+	start1.user_data[NPF_NODE_FLAGS] = 0;
 	start1.direction = trackdir;
 	NPFSetFlag(&start1, NPF_FLAG_IGNORE_RESERVED, true);