pixman-renderer: rename create_image_no_clear to create_image
Given that pixman_image_create_bits_no_clear() is asked to allocate the buffer on its own, the _no_clear part is not important. Drop it. Suggested in #713.
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Given that pixman_image_create_bits_no_clear() is asked to allocate the buffer on its own, the _no_clear part is not important. Drop it. Suggested in #713.