Handle numerical habits with target value of zero

Fixes #903

uhabits-android/build.gradle.kts

@@ -37,8 +37,8 @@ android {
     compileSdkVersion(30)
 
     defaultConfig {
-        versionCode(20001)
-        versionName("2.0.1")
+        versionCode(20002)
+        versionName("2.0.2")
         minSdkVersion(23)
         targetSdkVersion(30)
         applicationId("org.isoron.uhabits")

uhabits-android/src/main/java/org/isoron/uhabits/activities/common/views/TargetChart.kt

@@ -117,7 +117,11 @@ class TargetChart : View {
         barRect[rect.left + stop + padding, rect.top + baseSize * 0.05f, rect.right - padding] =
             rect.bottom - baseSize * 0.05f
         canvas.drawRoundRect(barRect, round, round, paint!!)
-        var percentage = (values[row] / targets[row]).toFloat()
+        var percentage = if (targets[row] > 0) {
+            (values[row] / targets[row]).toFloat()
+        } else {
+            1.0f
+        }
         percentage = min(1.0f, percentage)
 
         // Draw completed box

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

@@ -1,3 +1,5 @@
+2.0.2:
+* Bug fixes
 2.0:
 * Track numeric habits (e.g. how many pages did you read?)
 * Skip days without breaking your streak