remove incorrect spaces from filenames

panda/src/particlesystem/particlesystem_composite1.cxx

@@ -13,5 +13,5 @@
 #include "spriteParticleRenderer.cxx"
 #include "tangentRingEmitter.cxx"
 #include "zSpinParticle.cxx"
-#include "zSpinParticleFactory.cxx "
+#include "zSpinParticleFactory.cxx"
 

panda/src/putil/putil_composite2.cxx

@@ -17,6 +17,6 @@
 #include "vector_ushort.cxx"
 #include "vector_writable.cxx"
 #include "writable.cxx"
-#include "writableConfigurable.cxx "
-#include "writableParam.cxx "
+#include "writableConfigurable.cxx"
+#include "writableParam.cxx"