Fix EXIF string tags with 0 length
Fix EXIF string tags with 0 length

ruppmatt/cocotron,cyclaero/cocotron,gemu2015/cocotron-sierra,cneira/cocotron,guestOS/guestOS,ruppmatt/cocotron,guestOS/guestOS,Suninus/cocotron,cyclaero/cocotron,guestOS/guestOS,cjwl/cocotron,crystax/android-vendor-cocotron,cyclaero/cocotron,gemu2015/cocotron-sierra,crystax/android-vendor-cocotron,JackLian/cocotron,cjwl/cocotron,Suninus/cocotron,gemu2015/cocotron-sierra,cyclaero/cocotron,yuhangwang/cocotron,yuhangwang/cocotron,JackLian/cocotron,JackLian/cocotron,cjwl/cocotron,crystax/android-vendor-cocotron,cneira/cocotron,cneira/cocotron,ruppmatt/cocotron,JackLian/cocotron,cjwl/cocotron,ruppmatt/cocotron,Suninus/cocotron,cneira/cocotron,Suninus/cocotron,yuhangwang/cocotron,guestOS/guestOS,yuhangwang/cocotron,crystax/android-vendor-cocotron,gemu2015/cocotron-sierra