Fix naming.

src/apps/debugger/arch/Architecture.cpp

@@ -116,7 +116,7 @@ Architecture::CreateStackTrace(Team* team,
 	// attempt to continue building it from where it left off.
 	if (stackTrace->CountFrames() > 0) {
 		nextFrame = stackTrace->FrameAt(stackTrace->CountFrames() - 1);
-		cpuState = nextFrame->GetPreviousCpuState();
+		cpuState = nextFrame->PreviousCpuState();
 	}
 
 	while (cpuState != NULL) {

src/apps/debugger/model/StackFrame.h

@@ -55,7 +55,7 @@ public:
 			target_addr_t		InstructionPointer() const
 									{ return fInstructionPointer; }
 
-			CpuState*			GetPreviousCpuState() const
+			CpuState*			PreviousCpuState() const
 									{ return fPreviousCpuState; }
 			void				SetPreviousCpuState(CpuState* state);