Fixed various minor semantic glitches

There were various minor semantic glitches reported by cppcheck and
Andrei Smirnov.
(cherry picked from commit a4de8fa16a)

plugins/patman/patman.cpp

@@ -2,6 +2,7 @@
  * patman.cpp - a GUS-compatible patch instrument plugin
  *
  * Copyright (c) 2007-2008 Javier Serrano Polo <jasp00/at/users.sourceforge.net>
+ * Copyright (c) 2009-2011 Tobias Doerffel <tobydox/at/users.sourceforge.net>
  * 
  * This file is part of Linux MultiMedia Studio - http://lmms.sourceforge.net
  *
@@ -303,7 +304,7 @@ patmanInstrument::LoadErrors patmanInstrument::loadPatch(
 				short sample;
 				if ( fread( &sample, 2, 1, fd ) != 1 )
 				{
-					delete wave_samples;
+					delete[] wave_samples;
 					fclose( fd );
 					return( LoadIO );
 				}
@@ -327,7 +328,7 @@ patmanInstrument::LoadErrors patmanInstrument::loadPatch(
 				char sample;
 				if ( fread( &sample, 1, 1, fd ) != 1 )
 				{
-					delete wave_samples;
+					delete[] wave_samples;
 					fclose( fd );
 					return( LoadIO );
 				}

plugins/zynaddsubfx/src/Synth/OscilGen.cpp

@@ -1040,7 +1040,7 @@ void OscilGen::adaptiveharmonicpostprocess(REALTYPE *f, int size)
         }
     }
 
-    delete (inf);
+    delete[] inf;
 }