Fix some warnings in plProgressMgr.

Sources/Plasma/PubUtilLib/plProgressMgr/plProgressMgr.cpp

@@ -70,7 +70,7 @@ plProgressMgr   *plProgressMgr::fManager = nil;
 
 char* plProgressMgr::fImageRotation[LOADING_RES_COUNT];
 
-char* plProgressMgr::fStaticTextIDs[] = {
+const char* plProgressMgr::fStaticTextIDs[] = {
     "xLoading_Linking_Text.png",
     "xLoading_Updating_Text.png"
 };
@@ -249,7 +249,7 @@ char*   plProgressMgr::GetLoadingFrameID(int index)
         return fImageRotation[0];
 }
 
-char*   plProgressMgr::GetStaticTextID(StaticText staticTextType)
+const char*   plProgressMgr::GetStaticTextID(StaticText staticTextType)
 {
     return fStaticTextIDs[staticTextType];
 }

Sources/Plasma/PubUtilLib/plProgressMgr/plProgressMgr.h

@@ -197,7 +197,7 @@ class plProgressMgr
 
         static plProgressMgr    *fManager;
         static char*            fImageRotation[];
-        static char*            fStaticTextIDs[];
+        static const char*      fStaticTextIDs[];
 
     protected:
 
@@ -230,7 +230,7 @@ class plProgressMgr
 
         static plProgressMgr* GetInstance() { return fManager; }
         static char* GetLoadingFrameID(int index);
-        static char* GetStaticTextID(StaticText staticTextType);
+        static const char* GetStaticTextID(StaticText staticTextType);
 
         virtual void    Draw( plPipeline *p ) { }