Insurance — Homeowners — Coverage — Trial court properly entered summary judgment finding that policy did not provide coverage for damage caused by plumbing leak in condominium unit where policy required insured to reside in the unit at the time of loss as a condition of coverage, but insured did not reside in the unit at the time of loss — Court’s interpretation of policy did not render the policy illusory where residency provision did not affect other coverages, including personal liability — Insurer did not waive and was not estopped from relying upon the residence provision in denying coverage where insurer was not aware that insured was no longer a resident of unit until it conducted post-loss investigation