fix QUAT type registration after clang-format

[senselessDev]

The types with a colon and QUAT did not work for me. I think the problem is that clang-format changed the originally intended VERTEX_SE3:QUAT to VERTEX_SE3 : QUAT. This is reverted by this PR and it should not occur in the future anymore due to the temporary deactivation of clang-format.

[senselessDev]

Potentially also happened in

g2o/g2o/examples/interactive_slam/g2o_interactive/types_online.cpp

Lines 38 to 39 in bcb4cb1

	G2O_REGISTER_TYPE(ONLINE_VERTEX_SE3 : QUAT, OnlineVertexSE3);
	G2O_REGISTER_TYPE(ONLINE_EDGE_SE3 : QUAT, OnlineEdgeSE3);

[RainerKuemmerle]

Thank you.

[codecov]

Codecov Report

Merging #562 (ba5d605) into master (4736df5) will not change coverage.
The diff coverage is 0.00%.

@@           Coverage Diff           @@
##           master     #562   +/-   ##
=======================================
  Coverage   46.73%   46.73%           
=======================================
  Files         271      271           
  Lines       10775    10775           
=======================================
  Hits         5036     5036           
  Misses       5739     5739           

Impacted Files	Coverage Δ
g2o/types/slam3d/types_slam3d.cpp	0.00% <0.00%> (ø)

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