gl4: fix glsl version detection when there is no vendor specific info
gl4: fix glsl version detection when there is no vendor specific info

wrren/xenia,galek/xenia,bradparks/xenia__xbox_emulator,DaTrollMon/xenia,maxton/xenia,galek/xenia,TRex22/xenia,wrren/xenia,toxic88/xenia,galek/xenia,galek/xenia,TingPing/xenia,toxic88/xenia,no1dead/xenia,AbaiQi/xenia,sephiroth99/xenia,KitoHo/xenia,greg100795/xenia,Rhodan81/xenia,bradparks/xenia__xbox_emulator,DaTrollMon/xenia,sabretooth/xenia,greg100795/xenia,AbaiQi/xenia,wrren/xenia,pwz3n0/xenia,Rhodan81/xenia,sephiroth99/xenia,sabretooth/xenia,toxic88/xenia,MorganBauer/xenia,pwz3n0/xenia,pwz3n0/xenia,herman-rogers/xenia,pwz3n0/xenia,DaTrollMon/xenia,bowlofstew/xenia,no1dead/xenia,sephiroth99/xenia,no1dead/xenia,TingPing/xenia,TingPing/xenia,greg100795/xenia,AbaiQi/xenia,herman-rogers/xenia,maxton/xenia,TRex22/xenia,Rhodan81/xenia,herman-rogers/xenia,bowlofstew/xenia,KitoHo/xenia,KitoHo/xenia,Drooids/xenia,maxton/xenia,bowlofstew/xenia,greg100795/xenia,KitoHo/xenia,ObsidianGuardian/xenia,TRex22/xenia,Drooids/xenia,MorganBauer/xenia,sabretooth/xenia,bradparks/xenia__xbox_emulator,TingPing/xenia,MorganBauer/xenia,herman-rogers/xenia,MorganBauer/xenia,bradparks/xenia__xbox_emulator,AbaiQi/xenia,toxic88/xenia,ObsidianGuardian/xenia,ObsidianGuardian/xenia,bowlofstew/xenia,Drooids/xenia,wrren/xenia,no1dead/xenia,Rhodan81/xenia,DaTrollMon/xenia,Drooids/xenia