wined3d: Make sure some variables are always initialized.

dlls/wined3d/ati_fragment_shader.c

@@ -163,7 +163,11 @@ static GLuint register_for_arg(DWORD arg, WineD3D_GL_Info *gl_info, unsigned int
     GLenum ret;
 
     if(mod) *mod = GL_NONE;
-    if(arg == ARG_UNUSED) return -1; /* This is the marker for unused registers */
+    if(arg == ARG_UNUSED)
+    {
+        if (rep) *rep = GL_NONE;
+        return -1; /* This is the marker for unused registers */
+    }
 
     switch(arg & WINED3DTA_SELECTMASK) {
         case WINED3DTA_DIFFUSE:

dlls/wined3d/glsl_shader.c

@@ -1219,6 +1219,7 @@ static void shader_glsl_get_sample_function(DWORD sampler_type, BOOL projected,
             break;
         default:
             sample_function->name = "";
+            sample_function->coord_mask = 0;
             FIXME("Unrecognized sampler type: %#x;\n", sampler_type);
             break;
     }