$ANDROID_ROOT/hardware/qcom/display-caf/libhwcomposer/hwc.cpp

line 89:
replace
for(int i = 0; i < MAX_DISPLAYS; i++)
with
for(int i = 0; i < numDisplays; i++)

line 215:
replace
for (int32_t i = numDisplays; i >= 0; i--)
with
for (int32_t i = numDisplays-1; i >= 0; i--)

line 456:
replace
for (uint32_t i = 0; i <= numDisplays; i++)
with
for (uint32_t i = 0; i < numDisplays; i++)