fix compiler warnings #4
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Fixes warnings: > pico-ssd1306/ssd1306.c: In function 'ssd1306_draw_line': > pico-ssd1306/ssd1306.c:151:14: warning: pointer targets in passing argument 1 of 'swap' differ in signedness [-Wpointer-sign] > 151 | swap(&x1, &x2); and: > /home/jajcus/Dropbox/Modular/pico/screen_test/pico-ssd1306/ssd1306.c:193:21: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses] > 193 | if(line & 1 ==1)
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Fixes warnings:
and: