Fix crash when saving habit (some languages only)

android/uhabits-android/src/main/java/org/isoron/uhabits/activities/habits/edit/views/TargetPanel.java

@@ -57,7 +57,13 @@ public class TargetPanel extends FrameLayout
     public double getTargetValue()
     {
         String sValue = tvTargetValue.getText().toString();
-        return Double.parseDouble(sValue);
+        double value = 0;
+        try {
+            value = Double.parseDouble(sValue);
+        } catch (NumberFormatException e) {
+            // NOP
+        }
+        return value;
     }
 
     public void setTargetValue(double targetValue)

android/uhabits-android/src/main/play/release-notes/en-US/alpha.txt

@@ -1,5 +1,6 @@
 1.8.8
 * Small tweaks to the habit scheduling algorithm
+* Fix some crashes
 1.8:
 * New bar chart showing number of repetitions performed each week, month or year
 * Performing habits on irregular weekdays will no longer break your streak