Dirac: Solved problem with make checkheaders

(cherry picked from commit d611ea0a44)

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

libavcodec/diracdsp.h

@@ -21,6 +21,8 @@
 #ifndef AVCODEC_DIRACDSP_H
 #define AVCODEC_DIRACDSP_H
 
+#include <stdint.h>
+
 typedef void (*dirac_weight_func)(uint8_t *block, int stride, int log2_denom, int weight, int h);
 typedef void (*dirac_biweight_func)(uint8_t *dst, uint8_t *src, int stride, int log2_denom, int weightd, int weights, int h);