[PATCH] Don't put empty strings in buddy/divemaster

[Anton Lundin]

We store no value as a NULL, so we can omit that value from the xml and
git files.

This ensures the tag-diffing-thingie doesn't produce empty strings for
no value instead of NULL values.

Signed-off-by: Anton Lundin <glance at acc.umu.se>
---
 qt-ui/maintab.cpp | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/qt-ui/maintab.cpp b/qt-ui/maintab.cpp
index c6660fc..5569c2d 100644
--- a/qt-ui/maintab.cpp
+++ b/qt-ui/maintab.cpp
@@ -1214,7 +1214,10 @@ void MainTab::saveTaggedStrings()
 			}
 		}
 		free(mydive->buddy);
-		mydive->buddy = copy_string(qPrintable(newString));
+		if (newString == "")
+			mydive->buddy = NULL;
+		else
+			mydive->buddy = copy_string(qPrintable(newString));
 	);
 	addedList.clear();
 	removedList.clear();
@@ -1236,7 +1239,10 @@ void MainTab::saveTaggedStrings()
 			}
 		}
 		free(mydive->divemaster);
-		mydive->divemaster = copy_string(qPrintable(newString));
+		if (newString == "")
+			mydive->divemaster = NULL;
+		else
+			mydive->divemaster = copy_string(qPrintable(newString));
 	);
 }
 
-- 
2.1.4