display: Include mathematics.h for fallback definition of NAN
This fixes compilation with MSVC. Signed-off-by: Martin Storsjö <martin@martin.st>
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@ -23,6 +23,7 @@
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#include <math.h>
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#include <math.h>
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#include "display.h"
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#include "display.h"
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#include "mathematics.h"
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// fixed point to double
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// fixed point to double
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#define CONV_FP(x) ((double) (x)) / (1 << 16)
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#define CONV_FP(x) ((double) (x)) / (1 << 16)
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