[skip ci] Trim trailing whitespace in zend_compile.c

Introduced in 5544be7018. Trimming to simplify
the diff of the pipe operator RFC implementation.

Zend/zend_compile.c

@@ -8361,10 +8361,10 @@ static zend_op_array *zend_compile_func_decl_ex(
 			"nodiscard",
 			sizeof("nodiscard")-1
 		);
-	
+
 		if (nodiscard_attribute) {
 			op_array->fn_flags |= ZEND_ACC_NODISCARD;
-		}	
+		}
 	}
 
 	/* Do not leak the class scope into free standing functions, even if they are dynamically