added missing pre-depends for .so packages

debian/control

@@ -5,7 +5,7 @@ Build-Depends: cmake,
                debhelper (>= 9),
                libargtable2-dev,
                libboost-test-dev,
-               libcurl4-nss-dev | libcurl4-openssl-dev,
+               libcurl4-openssl-dev | libcurl4-nss-dev,
                libjsoncpp-dev,
                libmicrohttpd-dev
 Standards-Version: 3.9.6
@@ -16,6 +16,7 @@ Vcs-Browser: http://anonscm.debian.org/cgit/collab-maint/libjson-rpc-cpp.git
 
 Package: libjsonrpccpp-common0
 Architecture: any
+Pre-Depends: ${misc:Pre-Depends}
 Depends: ${misc:Depends}, ${shlibs:Depends}
 Suggests: libjsonrpccpp-client0 (= ${binary:Version}),
           libjsonrpccpp-server0 (= ${binary:Version}),
@@ -53,6 +54,7 @@ Description: debugging symbols for libjsonrpccpp-common0
 
 Package: libjsonrpccpp-client0
 Architecture: any
+Pre-Depends: ${misc:Pre-Depends}
 Depends: ${misc:Depends}, ${shlibs:Depends}
 Suggests: libjsonrpccpp-tools
 Description: library implementing json-rpc C++ clients
@@ -95,6 +97,7 @@ Description: debugging symbols for libjsonrpccpp-client0
 
 Package: libjsonrpccpp-server0
 Architecture: any
+Pre-Depends: ${misc:Pre-Depends}
 Depends: ${misc:Depends}, ${shlibs:Depends}
 Suggests: libjsonrpccpp-tools
 Description: library implementing json-rpc C++ servers