typedef void (*dxtFetchTexelFuncExt)( GLint srcRowstride, GLubyte *pixdata, GLint col, GLint row, GLvoid *texelOut );
-dxtFetchTexelFuncExt fetch_ext_rgb_dxt1 = NULL;
-dxtFetchTexelFuncExt fetch_ext_rgba_dxt1 = NULL;
-dxtFetchTexelFuncExt fetch_ext_rgba_dxt3 = NULL;
-dxtFetchTexelFuncExt fetch_ext_rgba_dxt5 = NULL;
+static dxtFetchTexelFuncExt fetch_ext_rgb_dxt1 = NULL;
+static dxtFetchTexelFuncExt fetch_ext_rgba_dxt1 = NULL;
+static dxtFetchTexelFuncExt fetch_ext_rgba_dxt3 = NULL;
+static dxtFetchTexelFuncExt fetch_ext_rgba_dxt5 = NULL;
typedef void (*dxtCompressTexFuncExt)(GLint srccomps, GLint width,
GLint height, const GLubyte *srcPixData,