Fix warnings caused by constant char pointers

Author: kvisle

include/soloud_c.h

@@ -190,7 +190,7 @@ int FFTFilter_setParametersEx(FFTFilter * aFFTFilter, int aShift, int aCombine /
  */
 void Speech_destroy(Speech * aSpeech);
 Speech * Speech_create();
-int Speech_setText(Speech * aSpeech, char * aText);
+int Speech_setText(Speech * aSpeech, const char * aText);
 void Speech_setLooping(Speech * aSpeech, int aLoop);
 void Speech_setFilter(Speech * aSpeech, int aFilterId, Filter * aFilter);
 void Speech_stop(Speech * aSpeech);

include/soloud_speech.h

@@ -39,7 +39,7 @@ namespace SoLoud
 		int mFrames;
 		darray mElement;
 		Speech();
-		int setText(char *aText);
+		int setText(const char *aText);
 		virtual ~Speech();
 		virtual AudioSourceInstance *createInstance();
 	};
@@ -59,4 +59,4 @@ namespace SoLoud
 	};
 };
 
-#endif
+#endif

src/audiosource/speech/soloud_speech.cpp

@@ -111,7 +111,7 @@ namespace SoLoud
 		return 0;
 	}	
 
-	int Speech::setText(char *aText)
+	int Speech::setText(const char *aText)
 	{
 		if (aText == NULL)
 			return INVALID_PARAMETER;

src/c_api/soloud_c.cpp

@@ -474,7 +474,7 @@ void * Speech_create()
   return (void *)new Speech;
 }
 
-int Speech_setText(void * aClassPtr, char * aText)
+int Speech_setText(void * aClassPtr, const char * aText)
 {
 	Speech * cl = (Speech *)aClassPtr;
 	return cl->setText(aText);