Adjust the deadzone for taps and swipes.
Adjust the deadzone for taps and swipes.

Fixes #990, or does for me.

libretro/ppsspp-native,Ced2911/native,hrydgard/native,zhykzhykzhyk/ppsspp-native,zhykzhykzhyk/ppsspp-native,unknownbrackets/native,unknownbrackets/native,unknownbrackets/native,Ced2911/native,libretro/ppsspp-native,libretro/ppsspp-native,hrydgard/native,libretro/ppsspp-native,Ced2911/native,zhykzhykzhyk/ppsspp-native,unknownbrackets/native,hrydgard/native,hrydgard/native,zhykzhykzhyk/ppsspp-native