d3dcompiler_43: Make write_dword_unknown() static.

dlls/d3dcompiler_43/d3dcompiler_private.h

@@ -603,6 +603,5 @@ static inline void write_dword(char **ptr, DWORD d)
 }
 
 void skip_dword_unknown(const char **ptr, unsigned int count) DECLSPEC_HIDDEN;
-void write_dword_unknown(char **ptr, DWORD d) DECLSPEC_HIDDEN;
 
 #endif /* __WINE_D3DCOMPILER_PRIVATE_H */

dlls/d3dcompiler_43/utils.c

@@ -520,7 +520,7 @@ void skip_dword_unknown(const char **ptr, unsigned int count)
     }
 }
 
-void write_dword_unknown(char **ptr, DWORD d)
+static void write_dword_unknown(char **ptr, DWORD d)
 {
     FIXME("Writing unknown DWORD 0x%08x\n", d);
     write_dword(ptr, d);