fix typo error: occured-> occurred

src/3rdparty/sqlite3/sqlite3.c

@@ -180331,7 +180331,7 @@ static int sessionBindRow(
 ** iterator pIter points to to the SELECT and attempts to seek to the table
 ** entry. If a row is found, the SELECT statement left pointing at the row 
 ** and SQLITE_ROW is returned. Otherwise, if no row is found and no error
-** has occured, the statement is reset and SQLITE_OK is returned. If an
+** has occurred, the statement is reset and SQLITE_OK is returned. If an
 ** error occurs, the statement is reset and an SQLite error code is returned.
 **
 ** If this function returns SQLITE_ROW, the caller must eventually reset() 

src/csync/std/c_string.h

@@ -89,7 +89,7 @@ int c_streq(const char *a, const char *b);
  *
  * @param size  Size to allocate.
  *
- * @return  Pointer to the newly allocated stringlist. NULL if an error occured.
+ * @return  Pointer to the newly allocated stringlist. NULL if an error occurred.
  */
 c_strlist_t *c_strlist_new(size_t size);
 
@@ -99,7 +99,7 @@ c_strlist_t *c_strlist_new(size_t size);
  * @param strlist  Stringlist to expand
  * @param size     New size of the strlinglist to expand
  *
- * @return  Pointer to the expanded stringlist. NULL if an error occured.
+ * @return  Pointer to the expanded stringlist. NULL if an error occurred.
  */
 c_strlist_t *c_strlist_expand(c_strlist_t *strlist, size_t size);
 
@@ -111,7 +111,7 @@ c_strlist_t *c_strlist_expand(c_strlist_t *strlist, size_t size);
  * @param strlist  Stringlist to add the string.
  * @param string   String to add.
  *
- * @return  0 on success, less than 0 and errno set if an error occured.
+ * @return  0 on success, less than 0 and errno set if an error occurred.
  *          ENOBUFS if the list is full.
  */
 int c_strlist_add(c_strlist_t *strlist, const char *string);
@@ -125,7 +125,7 @@ int c_strlist_add(c_strlist_t *strlist, const char *string);
  * @param strlist  Stringlist to add the string.
  * @param string   String to add.
  *
- * @return  0 on success, less than 0 and errno set if an error occured.
+ * @return  0 on success, less than 0 and errno set if an error occurred.
  */
 int c_strlist_add_grow(c_strlist_t **strlist, const char *string);
 

src/gui/wizard/owncloudoauthcredspage.ui

@@ -43,7 +43,7 @@
    <item>
     <widget class="QLabel" name="errorLabel">
      <property name="text">
-      <string>An error occured while connecting. Please try again.</string>
+      <string>An error occurred while connecting. Please try again.</string>
      </property>
      <property name="textFormat">
       <enum>Qt::PlainText</enum>