Common spelling errors fixed.

src/libpts/pts/pts.c

@@ -294,7 +294,7 @@ METHOD(pts_t, is_path_valid, bool, private_pts_t *this, char *path,
 	}
 	else
 	{
-		DBG1(DBG_PTS, "error: %s occured while validating path: %s",
+		DBG1(DBG_PTS, "error: %s occurred while validating path: %s",
 			 		   strerror(error), path);
 		return FALSE;
 	}

src/libpts/pts/pts.h

@@ -120,7 +120,7 @@ struct pts_t {
 	 * @param error_code	Output variable for PTS error code
 	 * @return				TRUE if path is valid or file/directory doesn't exist
 	 * 							or path is invalid
-	 * 						FALSE if local error occured within stat function
+	 * 						FALSE if local error occurred within stat function
 	 */
 	bool (*is_path_valid)(pts_t *this, char *path, pts_error_code_t *error_code);