Improve accuracy of opline lineno information

If compile_var() was used instead of compile_expr() we did not
update the current lineno.

Zend/tests/bug72101.phpt

@@ -79,7 +79,7 @@ Stack trace:
 #0 %sbug72101.php(8): {closure}(2, 'Parameter 1 to ...', '%s', 8, Array)
 #1 %sbug72101.php(27): PHPUnit_Framework_MockObject_Stub_ReturnCallback->invoke(Object(PHPUnit_Framework_MockObject_Invocation_Static))
 #2 %sbug72101.php(19): PHPUnit_Framework_MockObject_Matcher->invoked(Object(PHPUnit_Framework_MockObject_Invocation_Static))
-#3 %sbug72101.php(51): PHPUnit_Framework_MockObject_InvocationMocker->invoke(Object(PHPUnit_Framework_MockObject_Invocation_Static))
+#3 %sbug72101.php(52): PHPUnit_Framework_MockObject_InvocationMocker->invoke(Object(PHPUnit_Framework_MockObject_Invocation_Static))
 #4 %sbug72101.php(72): Mock_MethodCallbackByReference_7b180d26->bar(0, 0, 0)
 #5 {main}
   thrown in %sbug72101.php on line 61

Zend/zend_compile.c

@@ -7314,6 +7314,8 @@ void zend_compile_expr(znode *result, zend_ast *ast) /* {{{ */
 
 void zend_compile_var(znode *result, zend_ast *ast, uint32_t type) /* {{{ */
 {
+	CG(zend_lineno) = zend_ast_get_lineno(ast);
+
 	switch (ast->kind) {
 		case ZEND_AST_VAR:
 			zend_compile_simple_var(result, ast, type, 0);