Fixed bug 1474 - OpenGL renderer can't to display YV12 texture.

src/render/opengl/SDL_shaders_gl.c

@@ -244,7 +244,7 @@ CompileShaderProgram(GL_ShaderContext *ctx, int index, GL_ShaderData *data)
     /* Set up some uniform variables */
     ctx->glUseProgramObjectARB(data->program);
     for (i = 0; i < num_tmus_bound; ++i) {
-        char tex_name[5];
+        char tex_name[10];
         SDL_snprintf(tex_name, SDL_arraysize(tex_name), "tex%d", i);
         location = ctx->glGetUniformLocationARB(data->program, tex_name);
         if (location >= 0) {