GetVarFormatForChar needn't pass a char by const ref.

[brucem]

Summary

GetVarFormatForChar needn't pass a char by const ref.

tools/lldb-mi/MICmnLLDBDebugSessionInfoVarObj.h

enum varType_e
         eVarType_Composite, // i.e. struct
         eVarType_Internal,  // i.e. int
         eVarType_count      // Always last one
     };
 
     // Statics:
   public:
     static varFormat_e GetVarFormatForString(const CMIUtilString &vrStrFormat);
-    static varFormat_e GetVarFormatForChar(const char &vrcFormat);
+    static varFormat_e GetVarFormatForChar(char vcFormat);
     static CMIUtilString GetValueStringFormatted(const lldb::SBValue &vrValue, const varFormat_e veVarFormat);
     static void VarObjAdd(const CMICmnLLDBDebugSessionInfoVarObj &vrVarObj);
     static void VarObjDelete(const CMIUtilString &vrVarName);
     static bool VarObjGet(const CMIUtilString &vrVarName, CMICmnLLDBDebugSessionInfoVarObj &vrwVarObj);
     static void VarObjUpdate(const CMICmnLLDBDebugSessionInfoVarObj &vrVarObj);
     static void VarObjIdInc(void);
     static MIuint VarObjIdGet(void);
     static void VarObjIdResetToZero(void);

tools/lldb-mi/MICmnLLDBDebugSessionInfoVarObj.cpp

CMICmnLLDBDebugSessionInfoVarObj::GetVarFormatForString(const CMIUtilString &vrStrFormat)
     }
 
     return eVarFormat_Invalid;
 }
 
 //++ ------------------------------------------------------------------------------------
 // Details: Retrieve the var format enumeration for the specified character.
 // Type:    Static method.
-// Args:    vrcFormat   - (R) Character representing the var format.
+// Args:    vcFormat    - Character representing the var format.
 // Return:  varFormat_e - Var format enumeration.
 //                      - No match found return eVarFormat_Invalid.
 // Throws:  None.
 //--
 CMICmnLLDBDebugSessionInfoVarObj::varFormat_e
-CMICmnLLDBDebugSessionInfoVarObj::GetVarFormatForChar(const char &vrcFormat)
+CMICmnLLDBDebugSessionInfoVarObj::GetVarFormatForChar(char vcFormat)
 {
-    if ('r' == vrcFormat)
+    if ('r' == vcFormat)
         return eVarFormat_Hex;
 
     // CODETAG_SESSIONINFO_VARFORMAT_ENUM
     for (MIuint i = 0; i < eVarFormat_count; i++)
     {
         const char *pVarFormatChar = ms_aVarFormatChars[i];
-        if (*pVarFormatChar == vrcFormat)
+        if (*pVarFormatChar == vcFormat)
             return static_cast<varFormat_e>(i);
     }
 
     return eVarFormat_Invalid;
 }
 
 //++ ------------------------------------------------------------------------------------
 // Details: Return the equivalent var value formatted string for the given value type,