Correct warnings seen as errors by XCode in stringent mode

FrameLib_Exports/FrameLib_Objects.cpp

@@ -0,0 +1,4 @@
+
+#include "FrameLib_Objects.h"
+
+// N.B. This file simply includes the objects that are header only

FrameLib_Objects/Generators/FrameLib_Gaussian.cpp

@@ -1,5 +1,5 @@
 
-#include <FrameLib_Gaussian.h>
+#include "FrameLib_Gaussian.h"
 
 // Constructor
 

FrameLib_Objects/Parameters/FrameLib_ParamAlias.cpp

@@ -65,9 +65,9 @@ void FrameLib_ParamAlias::initialise()
             unsigned long idx = mParameters.size();
             const char *tag = it->mInTag.c_str();
             const Parameters *params = (*jt)->getParameters();
-            unsigned paramIdx = -1;
+            unsigned long paramIdx = -1;
 
-            if ((paramIdx = params->getIdx(it->mOutTag.c_str())) != -1)
+            if ((paramIdx = params->getIdx(it->mOutTag.c_str())) != unsigned long(-1))
             {
                 double value = params->getDefault(paramIdx);