Fix to getProfilePics

Trying to get a profile picture would never return `done` when the contact is not on your contacts list.
This happens because the promise `window.Store.ProfilePicThumb.find(id)` rejects it if not found.

webwhatsapi/js/wapi.js

@@ -918,7 +918,9 @@ window.WAPI.getProfilePicSmallFromId = function(id, done) {
         } else {
             done(false);
         }
-    })
+    }, function(e) {
+		done(false);
+	})
 };
 
 window.WAPI.getProfilePicFromId = function(id, done) {
@@ -928,7 +930,9 @@ window.WAPI.getProfilePicFromId = function(id, done) {
         } else {
             done(false);
         }
-    })
+    }, function(e) {
+		done(false);
+	})
 };
 
 window.WAPI.downloadFileWithCredentials = function (url, done) {
@@ -1292,4 +1296,4 @@ window.WAPI.removeParticipantGroup = function(idGroup, idParticipant, done){
         done(false); return false; 
     })
 
-}
+}