Prevent INFINITY value being written to JSON

Prevent the audio track playback percentage from being set to INFINITY
if the track position appears to be INFINITY. This can happen before the
track starts playing.

Author: Robin Smith

src/ios/RmxAudioPlayer.m

@@ -1030,6 +1030,12 @@ - (NSDictionary*) getPlayerStatusItem:(AudioTrack*)playerItem
     NSDictionary* bufferInfo = [self getTrackBufferInfo:currentItem];
     float position = [self getTrackCurrentTime:currentItem];
     float duration = [bufferInfo[@"duration"] floatValue];
+
+    // Correct this value here, so that playbackPercent is not set to INFINITY
+    if (isnan(position) || isinf(position)) {
+        position = 0.0f;
+    }
+
     float playbackPercent = duration > 0 ? (position / duration) * 100.0 : 0.0f;
 
     NSString* status = @"";
@@ -1053,10 +1059,6 @@ - (NSDictionary*) getPlayerStatusItem:(AudioTrack*)playerItem
         }
     }
 
-    if (isnan(position) || isinf(position)) {
-        position = 0.0f;
-    }
-
     NSDictionary *info = @{
                            @"trackId": currentItem.trackId,
                            @"isStream": currentItem.isStream ? @(1) : @(0),