Fix segmentation fault when moving blocks manually #9737

Job	Run time
B: Building VtR (release, 0)	22m 44s
B: GCC 9 (Ubuntu Jammy - 22.04)	22m 43s
F: C/C++	2m 5s
B: Building VtR (debug, 0)	18m 44s
B: GCC 10 (Ubuntu Jammy - 22.04)	25m 21s
ODIN-II Basic Test	40m 20s
F: Python	1m 47s
B: Building VtR (debug, 1)	20m 1s
B: GCC 11 (Ubuntu Jammy - 22.04)	24m 9s
F: Python Lint	2m 38s
B: GCC 12 (Ubuntu Jammy - 22.04)	29m 1s
Parmys Basic Test	33m 24s
B: Clang 11 (Ubuntu Jammy - 22.04)	27m 31s
S: Basic	26m 59s
R: Basic	23m 42s
B: Clang 12 (Ubuntu Jammy - 22.04)	28m 14s
U: C++ Unit Tests	21m 17s
R: Basic with highest assertion level	22m 4s
B: Clang 13 (Ubuntu Jammy - 22.04)	27m 38s
R: Basic_odin	18m 31s
VQM2BLIF Basic Tests	22m 30s
B: Clang 14 (Ubuntu Jammy - 22.04)	27m 53s
R: Basic with NO_GRAPHICS	16m 36s
W: Check Compilation Warnings	19m 27s
R: Basic with NO_SERVER	20m 28s
R: Basic with CAPNPROTO disabled	21m 59s
R: Basic with VTR_ENABLE_DEBUG_LOGGING	14m 8s
R: Basic_odin with VTR_ENABLE_DEBUG_LOGGING	18m 19s
R: Strong	32m 21s
R: Strong_odin	25m 3s
R: Valgrind Memory	27m 31s
Coverity Scan	25m 29s
	11h 50m 37s

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