Fixed map loading

app/src/main/java/com/mirenkov/ktheightmap/MapCanvas.kt

@@ -175,7 +175,7 @@ fun MapCanvas(
         }
 
         val crossRadius = 24F
-        drawCursor(halvedX, halvedY, crossRadius, KhmParser.getHeight(lon, lat, ctx), textMeasurer)
+        drawCursor(halvedX, halvedY, crossRadius, height, textMeasurer)
 
         val additionalSize = if (debug) 96F else 0F
         val infoBoxSize = Size(216F, 96F + additionalSize)

app/src/main/java/com/mirenkov/ktheightmap/parser/KhmParser.kt

@@ -23,15 +23,15 @@ class KhmParser {
 
         fun load(filePath: String, ctx: Context) {
             if (fileExists(ctx)) {
-                return
+                clear(ctx)
             }
 
             val inp = FileInputStream(filePath)
 
-            if (checkHeader(inp))
             ctx.openFileOutput(HEIGHT_FILE, Context.MODE_PRIVATE).use {
                 it.write(inp.readBytes())
             }
+
             inp.close()
         }
 
@@ -93,7 +93,7 @@ class KhmParser {
 
         fun getHeight(lon: Float, lat: Float, ctx: Context): UShort {
             if (!fileExists(ctx))
-                return 0u.toUShort()
+                return 0u
             val dis = DataInputStream(ctx.openFileInput(HEIGHT_FILE))
             dis.use {
                 val header = readHeader(dis)