Fixed some warnings

src/msgPrintControl.h

@@ -23,7 +23,7 @@ class HIDDEN msgPrintControlKey {
     // -1 indicates a non-axis specific message
     int axisNo_;
 
-    const char *functionName_;
+    std::string functionName_;
     int line_;
 
     /**
@@ -38,7 +38,7 @@ class HIDDEN msgPrintControlKey {
 
     bool operator==(const msgPrintControlKey &other) const {
         return axisNo_ == other.axisNo_ && line_ == other.line_ &&
-               strcmp(functionName_, other.functionName_) == 0 &&
+               functionName_ == other.functionName_ &&
                controller_ == other.controller_;
     }
 
@@ -55,7 +55,7 @@ template <> struct hash<msgPrintControlKey> {
         // Combine the hashes of the members (x and y)
         size_t h1 = std::hash<std::string>{}(obj.controller_);
         size_t h2 = hash<int>{}(obj.axisNo_);
-        size_t h3 = std::hash<const char *>{}(obj.functionName_);
+        size_t h3 = std::hash<std::string>{}(obj.functionName_);
         size_t h4 = hash<int>{}(obj.line_);
         // Combine the hashes (simple XOR and shifting technique)
         return h1 ^ (h2 << 1) ^ (h3 << 2) ^ (h4 << 3);