Fix some warnings

externals/microprofile/microprofileui.h

@@ -1991,7 +1991,7 @@ const char* MicroProfileUIMenuGroups(int nIndex, bool* bSelected)
     else
     {
         nIndex = nIndex-1;
-        if(nIndex < UI.GroupMenuCount)
+        if(static_cast<uint32_t>(nIndex) < UI.GroupMenuCount)
         {
             MicroProfileGroupMenuItem& Item = UI.GroupMenu[nIndex];
             static char buffer[MICROPROFILE_NAME_MAX_LEN+32];
@@ -2134,7 +2134,7 @@ const char* MicroProfileUIMenuCustom(int nIndex, bool* bSelected)
     case 1: return "--";
     default:
         nIndex -= 2;
-        if(nIndex < UI.nCustomCount)
+        if(static_cast<uint32_t>(nIndex) < UI.nCustomCount)
         {
             return UI.Custom[nIndex].pName;
         }
@@ -2184,7 +2184,7 @@ void MicroProfileUIClickGroups(int nIndex)
     else
     {
         nIndex -= 1;
-        if(nIndex < UI.GroupMenuCount)
+        if(static_cast<uint32_t>(nIndex) < UI.GroupMenuCount)
         {
             MicroProfileGroupMenuItem& Item = UI.GroupMenu[nIndex];
             if(Item.nIsCategory)