Fix segmentation fault for release build mode

'int IAFBApi::callSync(...)' is missing a return
statement. When the sdk is compiled in release mode
executing this code results in a segmentation fault.

According to the C++ standard, a return statement is
required on a function that returns a non-void value.
Specifically: <<Flowing off the end of a function is
equivalent to a return with no value; this results in
undefined behaviour in a value-returning function.>>

The proposed fix provides the missing return statement
for IAFBApi's callSync method.

Upstream-Status: Pending

Signed-off-by: Raquel Medina <raquel.medina@konsulko.com>

diff --git a/platforms/agl/alexa-voiceagent-service/src/plugins/afb/AFBApiImpl.cpp b/platforms/agl/alexa-voiceagent-service/src/plugins/afb/AFBApiImpl.cpp
index 5ed9bce..e68ef7f 100644
--- a/src/plugins/afb/AFBApiImpl.cpp
+++ b/src/plugins/afb/AFBApiImpl.cpp
@@ -77,6 +77,8 @@ int AFBApiImpl::callSync(
         info = infoStr;
         free(infoStr);
     }
+
+    return rc;
 }

 /// Shim to transfer C++ function to C callback using void*