Choose better alignment for heavy-duty rendering structures, patch by Matt Turner (#4981)

code/renderer/tr_shader.c

@@ -1878,6 +1878,8 @@ static void FixRenderCommandList( int newShader ) {
 		const void *curCmd = cmdList->cmds;
 
 		while ( 1 ) {
+			curCmd = PADP(curCmd, sizeof(void *));
+
 			switch ( *(const int *)curCmd ) {
 			case RC_SET_COLOR:
 				{