Debugger: Speed up disassembly retrieval
Debugger: Speed up disassembly retrieval

This skips the case of "disassembling a function given an address"
with indeterministic time behaviour and and immediately falls back
to the fixed range version instead.

Change-Id: I90ec56198a7d767bcf0a9ffb030637c2ee5c617a
Reviewed-by: Kai Koehne <077bc265216106fb22408e62f2d97925ede69d10@digia.com>

farseerri/git_code,omniacreator/qtcreator,duythanhphan/qt-creator,colede/qtcreator,amyvmiwei/qt-creator,farseerri/git_code,Distrotech/qtcreator,kuba1/qtcreator,richardmg/qtcreator,amyvmiwei/qt-creator,maui-packages/qt-creator,amyvmiwei/qt-creator,omniacreator/qtcreator,amyvmiwei/qt-creator,maui-packages/qt-creator,omniacreator/qtcreator,xianian/qt-creator,richardmg/qtcreator,martyone/sailfish-qtcreator,AltarBeastiful/qt-creator,syntheticpp/qt-creator,kuba1/qtcreator,AltarBeastiful/qt-creator,martyone/sailfish-qtcreator,maui-packages/qt-creator,richardmg/qtcreator,syntheticpp/qt-creator,omniacreator/qtcreator,xianian/qt-creator,duythanhphan/qt-creator,kuba1/qtcreator,colede/qtcreator,amyvmiwei/qt-creator,malikcjm/qtcreator,danimo/qt-creator,maui-packages/qt-creator,AltarBeastiful/qt-creator,danimo/qt-creator,maui-packages/qt-creator,kuba1/qtcreator,omniacreator/qtcreator,martyone/sailfish-qtcreator,martyone/sailfish-qtcreator,darksylinc/qt-creator,darksylinc/qt-creator,danimo/qt-creator,Distrotech/qtcreator,AltarBeastiful/qt-creator,darksylinc/qt-creator,farseerri/git_code,colede/qtcreator,darksylinc/qt-creator,xianian/qt-creator,malikcjm/qtcreator,xianian/qt-creator,duythanhphan/qt-creator,colede/qtcreator,amyvmiwei/qt-creator,duythanhphan/qt-creator,danimo/qt-creator,syntheticpp/qt-creator,darksylinc/qt-creator,duythanhphan/qt-creator,martyone/sailfish-qtcreator,martyone/sailfish-qtcreator,syntheticpp/qt-creator,farseerri/git_code,farseerri/git_code,malikcjm/qtcreator,xianian/qt-creator,martyone/sailfish-qtcreator,colede/qtcreator,duythanhphan/qt-creator,AltarBeastiful/qt-creator,kuba1/qtcreator,richardmg/qtcreator,syntheticpp/qt-creator,malikcjm/qtcreator,amyvmiwei/qt-creator,kuba1/qtcreator,Distrotech/qtcreator,farseerri/git_code,syntheticpp/qt-creator,malikcjm/qtcreator,darksylinc/qt-creator,xianian/qt-creator,darksylinc/qt-creator,xianian/qt-creator,danimo/qt-creator,Distrotech/qtcreator,darksylinc/qt-creator,AltarBeastiful/qt-creator,colede/qtcreator,xianian/qt-creator,Distrotech/qtcreator,danimo/qt-creator,kuba1/qtcreator,farseerri/git_code,danimo/qt-creator,AltarBeastiful/qt-creator,martyone/sailfish-qtcreator,amyvmiwei/qt-creator,richardmg/qtcreator,richardmg/qtcreator,kuba1/qtcreator,Distrotech/qtcreator,AltarBeastiful/qt-creator,martyone/sailfish-qtcreator,malikcjm/qtcreator,syntheticpp/qt-creator,omniacreator/qtcreator,maui-packages/qt-creator,omniacreator/qtcreator,danimo/qt-creator,kuba1/qtcreator,Distrotech/qtcreator,richardmg/qtcreator,malikcjm/qtcreator,danimo/qt-creator,xianian/qt-creator,maui-packages/qt-creator,colede/qtcreator,farseerri/git_code,duythanhphan/qt-creator