SCI: Fix crash in Island of Dr. Brain microscope puzzle - bug 14546

When clicking "buy clue" in the microscope puzzle, the game could crash with a division by zero in
cartesian:buyClue, depending on the initialization of the puzzle itself. Because the initialization is
random and non-deterministic, this crash would only occur very rarely

engines/sci/engine/workarounds.cpp

@@ -390,6 +390,7 @@ const SciWorkaroundEntry uninitializedReadWorkarounds[] = {
 	{ GID_HOYLE5,         -1,  6000,  1,              "sHand", "handleEvent",                  nullptr,     4,     4, { WORKAROUND_FAKE,   0 } }, // Solitaire: when clicking on an empty card base in any game
 	{ GID_ISLANDBRAIN,   100,   937,  0,            "IconBar", "dispatchEvent",                nullptr,    58,    58, { WORKAROUND_FAKE,   0 } }, // when using ENTER at the startup menu - bug #5241
 	{ GID_ISLANDBRAIN,   140,   140,  0,              "piece", "init",                         nullptr,     3,     3, { WORKAROUND_FAKE,   1 } }, // first puzzle right at the start, some initialization variable. bnt is done on it, and it should be non-0
+	{ GID_ISLANDBRAIN,   160,   165,  0,          "cartesian", "buyClue",                      nullptr,     0,     0, { WORKAROUND_FAKE,   1 } }, // microscope puzzle: upon click of buy clue - depends on non-deterministic initialization for puzzle. Before div occurs, temp0 must be non-0 - bug #14546
 	{ GID_ISLANDBRAIN,   180,   190,  0,               "word", "dispatchEvent",                nullptr,    14,    15, { WORKAROUND_FAKE,   0 } }, // holding down enter key during the word search puzzle, temps 14 and 15
 	{ GID_ISLANDBRAIN,   200,   268,  0,          "anElement", "select",                       nullptr,     0,     0, { WORKAROUND_FAKE,   0 } }, // elements puzzle, gets used before super TextIcon
 	{ GID_JONES,           1,   232,  0,        "weekendText", "draw",          sig_uninitread_jones_1,     0,     0, { WORKAROUND_FAKE,   0 } }, // jones/cd only - gets called during the game