Fixes according to comments

Author: vrabaud

include/avif/avif.h

@@ -85,11 +85,11 @@ extern "C" {
     ((AVIF_VERSION_MAJOR * 1000000) + (AVIF_VERSION_MINOR * 10000) + (AVIF_VERSION_PATCH * 100) + AVIF_VERSION_DEVEL)
 
 typedef int avifBool;
-typedef enum avifTrueFalse
+enum avifTrueFalse_
 {
     AVIF_FALSE = 0,
     AVIF_TRUE = 1
-} avifTrueFalse;
+};
 
 #define AVIF_DIAGNOSTICS_ERROR_BUFFER_SIZE 256
 

include/avif/internal.h

@@ -69,7 +69,7 @@ static inline void avifBreakOnError()
     } while (0)
 #else
 #define AVIF_ASSERT_OR_RETURN(A) assert(A)
-#define AVIF_ASSERT_NOT_REACHED_OR_RETURN assert(AVIF_FALSE);
+#define AVIF_ASSERT_NOT_REACHED_OR_RETURN assert(0);
 #endif
 
 // ---------------------------------------------------------------------------